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See detailMeasuring impulsivity in Children: Adaptation and Validation of a Short Version of the UPPS-P Impulsive Behaviors Scale in Children and Investigation of Its Links with ADHD
Geurten, Marie; Catale, Corinne; Gay, Philippe; Deplus, Sandrine; Billieux, Joël

in Journal of Attention Disorders (2021), 25(1), 105-114

Objective: Impulsivity is a multifaceted construct known to play a crucial role in the development and maintenance of a wide range of problematic behaviors and psychological disorders in children. Method: In this study, we adapted the short French adult version of the UPPS-P Impulsive Behavior Scale for use with children (short UPPS-P-C) and tested its psychometric properties. Results: Confirmatory factor analyses conducted on a sample of 425 children (aged from 8 to 14 years) supported the five-factor structure of the scale. Additional analyses emphasized the good internal and test-retest reliability of the short UPPS-P-C. Furthermore, our results also revealed that lack of premeditation and urgency subscales were able to discriminate between children diagnosed with attention-deficit/hyperactivity disorder (ADHD) and their matched controls. Conclusion: These results suggest that the short UPPS-P-C may be considered as a promising time-saving tool to assess impulsivity traits in healthy children and in children with psychiatric disorders.

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See detailClarifying the Role of Negative Emotions in the Origin and Control of Impulsive Actions.
Eben, Charlotte; Billieux, Joël; Verbruggen, Frederick

in Psychologica Belgica (2020), 60(1), 1-17

This critical review elaborates on the origin of impulsive actions and how these can be controlled. We focus in particular on the role of negative events. First, we outline how impulsive actions often originate from negative events that are (emotionally) appraised. A discrepancy between this current state and a desired goal state leads to action tendencies. The urgency of the resulting action depends on the importance of the goal and the size of the discrepancy. Second, we discuss how such impulsive actions can be regulated or controlled e.g. by biasing competition between different options, or by completely suppressing all motor output. Importantly, such control mechanisms might also depend on emotional factors. To reconcile these findings, we present a coherent theoretical framework, taking into account various cognitive, affective, and motivational mechanisms as well as contextual factors that play a crucial role in the origin and control of impulsive actions.

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See detailFace validity evaluation of screening tools for gaming disorder: Scope, language, and overpathologizing issues.
King, Daniel; Billieux, Joël; Carragher, Natacha; Delfabbro, Paul

in Journal of behavioral addictions (2020), 9(1), 1-13

Aim: Critics of gaming disorder (GD; i.e., Internet gaming disorder in the DSM-5; Gaming disorder in the ICD-11) have expressed concerns about the potential risks of misclassification (e.g., false positives). An important consideration of relevance to this discussion is the extent to which commonly used screening instruments contain appropriate, sensible, and relevant items. The aim of this review was to evaluate the face validity of items within current tools for GD. Methods: A systematic review of databases identified 29 instruments. An item bank (n = 417 items) was independently evaluated by three professional raters (i.e., a senior academic in clinical psychology, a senior psychometrician, and an academic/clinical psychologist) according to guidelines for defining and measuring addiction and gaming disorder. Findings: Evaluation of the item bank identified issues related to: scope (i.e., "scope creep" or items of questionable relevance); language (i.e., confusing language, unusual wording or syntax); and overpathologizing (i.e., pathologizing typical and/or beneficial aspects or consequences of gaming). A total of 71 items across 23 tools had at least one face validity issue. Conclusions: Most items (83%) demonstrated satisfactory face validity and were consistent with either the DSM-5 or ICD-11 GD classification. However, many tests contain at least one item that may pathologize normal gaming behaviors. Such items refer to basic changes in mood when gaming, a desire to play or continue playing games, and experiencing immersion when gaming. This analysis highlights the challenges of screening for problematic behaviors that are thought to arise within the context of normal recreational activities.

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See detailProblematic online sexual activities in men: The role of self‐esteem, loneliness, and social anxiety
Wéry, Aline; Canale, Natale; Bell, Caroline; Duvivier, Benoit; Billieux, Joël

in Human Behavior and Emerging Technologies (2020), 2

Several studies have shown that problematic use of online sexual activities (OSAs) can constitute a dysfunctional coping strategy that reflects a compensatory usage of the Internet. Yet, some specific risk factors—widely investigated in the field of general problematic Internet use—have to date been scarcely studied within the context of OSA. Hence, the goal of this study was to test a theoretical model in which self‐esteem, loneliness, and social anxiety are hypothesized to predict the type of OSAs favored and their potential addictive use. To this end, an online survey was conducted in a sample of self‐selected men who used OSAs on a regular basis (N = 209). Results showed that low self‐esteem is positively associated with loneliness and high social anxiety, which were in turn positively related to involvement in two specific OSAs: use of pornography and the search for online sexual contacts. Higher engagement in these OSA activities was related to symptoms of addictive usage. These findings underline the importance in psychological interventions of taking into account the specific OSA practiced to improve self‐esteem and to reduce loneliness and symptoms of social anxiety

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See detailFurther exploration of the SUPPS-P Impulsive Behavior Scale’s factor structure: Evidence from a large Hungarian sample
Zsila, Ágnes; Bőthe, Beáta; Demetrovics, Zsolt; Billieux, Joël; Orosz, Gábor

in Current Psychology (2020), 39

Background: Impulsivity is a multidimensional construct playing a pervasive role in psychiatry and neuropsychology. Lynam et al. (2006) have developed the 59-item UPPS-P Impulsive Behavior Scale, which assesses five distinct impulsivity dimensions: positive urgency, negative urgency, lack of perseverance, lack of premeditation, and sensation seeking. The short, 20-item version of the UPPS-P (SUPPS-P; Billieux et al. 2012) has been developed and adapted into several languages, including English, French, Italian, Spanish, and Arabic. The aim of the present study was to test four theoretical models of the SUPPS-P in a large sample of Hungarian adults. Methods: A total of 15,703 participants (64.76% male; Mage = 33.42 years, SD = 11.06) completed the SUPPS-P using an online questionnaire. Results: Confirmatory factor analyses corroborated the first-order five-factor model of impulsivity and a hierarchical model representing three higher-order constructs (urgency, lack of conscientiousness, sensation seeking), whereas the one-factor and three-factor model were not supported. The factor structure of the SUPPS-P preserved the original, theory-driven structure of the UPPS-P model and this instrument demonstrated good internal consistency. Hypersexual behavior consequences were positively associated with most SUPPS-P components, thus criterion validity was also supported. Conclusion: The SUPPS-P had strong psychometric properties that reflected the theoretical structure of the original UPPS-P model, thus it constitutes a theoretically grounded and time saving multidimensional instrument for assessing impulsivity.

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See detailNon-problematic and problematic binge-watchers do not differ on prepotent response inhibition: A preregistered pilot experimental study
Flayelle, Maèva; Verbruggen, Frederick; Schiel, Julie; Vögele, Claus; Maurage, Pierre; Billieux, Joël

in Human Behavior and Emerging Technologies (2020), 2

Binge‐watching (i.e., watching multiple episodes of a TV series back‐to‐back) has become standard viewing practice. Yet, this phenomenon has recently generated concerns regarding its potential negative outcomes on the long run. The presumed addictive nature of this behavior has also received increasing scientific interest, with preliminary findings reporting associations between binge‐watching, self‐control impairments, and heightened impulsivity. Nevertheless, previous studies only relied on self‐report data. The current preregistered study therefore investigated whether non‐problematic and problematic binge‐watchers differ not only in self‐report but also in experimental measures of behavioral impulsivity. Based on their viewing characteristics, 60 TV series viewers were allocated to one of three predetermined groups: non‐binge‐watchers, trouble‐free binge‐watchers (absence of negative impact) and problematic binge‐watchers (presence of negative impact). Participants performed tasks assessing response inhibition (Stop‐Signal Task) and impulsive reward seeking (Delay Discounting Task), and completed self‐reported questionnaires on sociodemographics, affect, symptoms of problematic binge‐watching, and impulsive personality traits. According to the preregistered analytic plan, one‐way analyses of covariance (ANCOVAs) were computed to compare the predetermined groups. With gender being controlled for, no differences were identified in self‐report impulsivity and response inhibition abilities. Trouble‐free binge‐watchers reported higher rates of delay discounting than non‐binge‐watchers. Although preliminary, our results challenge the notion that problematic binge‐watching is characterized by the same neuropsychological impairments as in addictive disorders as, contrary to our preregistered hypotheses, no differences emerged between non‐problematic and problematic binge‐watchers regarding self‐control variables considered as hallmarks of the latter. These results suggest the need for formulating and testing alternative conceptualizations of problematic binge‐watching.

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See detailChapter 16 - Cognitive factors associated with gaming disorder
Billieux, Joël; Potenza, Marc N.; Maurage, Pierre; Brevers, Damien; Brand, Matthias; King, Daniel L.

in Verdejo-Garcia, Antonio (Ed.) Cognition and Addiction (2020)

There is substantial clinical and public health evidence that video gaming, particularly online gaming, can become excessive and lead to psychological distress and functional impairment. This has led to the inclusion of gaming disorder as an official mental condition in the International Classification of Diseases, 11th Edition (ICD-11; World Health Organization, 2019). Psychological models recognize the importance of cognitive factors to explain the initiation, development, and maintenance of problematic gaming behaviors. This chapter will summarize some of the known cognitive factors associated with problem gaming and gaming disorder. These cognitions will be divided into two broad categories: (1) cognitive deficits (e.g., impaired executive functioning, hazardous decision-making, or deliberative processes) and (2) cognitive biases (e.g., attentional biases, cognitive distortions, dysfunctional cognitions). This chapter will review and synthesize available research findings and highlight their clinical implications for gaming disorder. The limitations of the research base are considered and some potential avenues for future research are proposed.

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See detailFactor structure and measurement invariance of the problematic mobile phone use questionnaire-short version across gender in Chinese adolescents and young adults
Wang, Ying-Ying; Long, Jiang; Liu, Yue-Heng; Liu, Tie-Qiao; Billieux, Joël

in BMC Psychiatry (2020), 20

Background: Problematic mobile phone use (PMPU) has become a public health issue in China, particularly in adolescents and young adults. The Problematic Mobile Phone Use Questionnaire-Short Version (PMPUQ-SV) is a validated instrument that measures multiple aspects of PMPU. The current study aimed to test the psychometric characteristics of a Chinese adaption of the PMPUQ-SV and examine its measurement invariance across gender. Methods: A total of 2086 participants were recruited form nine schools (six undergraduate colleges and three vocational colleges) through an online platform. Measures included socio-demographic variables, patterns of mobile phone use, the Chinese version of the PMPUQ-SV (C-PMPUQ-SV), the Chinese version of the Smartphone Addiction Proneness Scale (C-SAPS), and the Depression Anxiety Stress Scales (DASS-21). Results: Exploratory and confirmatory factor analyses conducted in two independent subsamples confirmed that the postulated dimensions fit the data well. Four items, judged as either outdated or not adapted to the Chinese context, performed poorly and were removed, resulting in a shorter 11-item scale. Convergent validity was established through correlations between emotional symptoms and the C-PMPUQ-SV and addictive smartphone use. Additional measurement invariance analyses showed that the scale performed largely similarly in male and female participants. Conclusions: The present study demonstrated that the C-PMPUQ-SV is an adequate instrument to study various types of PMPU in Chinese adolescents and young adults. The updated 11-item scale shortens the evaluation time and is adapted to assess contemporary smartphone use.

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See detailA dual‐process exploration of binge drinking: Evidence through behavioral and electrophysiological findings
Lannoy, Séverine; Dormal, Valérie; Billieux, Joël; Brion, Mélanie; D'Hondt, Fabien; Maurage, Pierre

in Addiction Biology (2020), 25(2), 12685

The dual‐process model, describing addictive disorders as resulting from an imbalance between increased automatic approach behaviors towards the substance and reduced abilities to control these behaviors, constitutes a sound theoretical framework to understand alcohol‐use disorders. The present study aimed at exploring this imbalance at behavioral and cerebral levels in binge drinking, a pattern of excessive alcohol consumption frequently observed in youth, by assessing both reflective control abilities and automatic processing of alcohol‐related stimuli. For this purpose, 25 binge drinkers and 25 comparison participants performed a Go/No‐Go task during electrophysiological recording. Inhibition abilities were investigated during explicit (ie, distinguishing alcoholic versus nonalcoholic drinks) and implicit (ie, distinguishing sparkling versus nonsparkling drinks, independently of their alcohol content) processing of beverage cues. Binge drinkers presented poorer inhibition for the explicit processing of beverage cues, as well as reduced N200 amplitude for the specific processing of alcohol‐related stimuli. As a whole, these findings indicated inhibition impairments in binge drinkers, particularly for alcohol cues processing and at the attentional stage of the cognitive stream. In line with the dual‐process model, these results support that binge drinking is already characterized by an underactivation of the reflective system combined with an overactivation of the automatic system. Results also underlined the influence of explicit processing compared with implicit ones. At the clinical level, our findings reinforce the need to develop intervention methods focusing on the inhibition of approach behaviors towards alcohol‐related stimuli.

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See detailBinge-Watching: What Do we Know So Far? A First Systematic Review of the Evidence
Flayelle, Maèva; Maurage, Pierre; Ridell Di Lorenzo, Kim; Vögele, Claus; Gainsbury, Sally M.; Billieux, Joël

in Current Addiction Reports (2020), 7(1), 44-60

Purpose of Review: Along with the expansion of on-demand viewing technology, the practice of binge-watching (i.e., watching multiple episodes of TV series back-to-back) has recently gained increasing research interest, given its potential harmfulness and presumed addictive characteristics. The present article provides the first systematic review of the evidence regarding this increasingly widespread behavior. Recent Findings: The results of this systematic review (including 24 studies and 17,545 participants) show that binge-watching remains an ill-defined construct as no consensus exists on its operationalization and measurement. Although such methodological disparities across studies hinder the comparability of results, the preliminary findings gathered here mainly point to the heterogeneous nature of binge-watching which covers at least two distinct realities, i.e., high but non-harmful engagement and problematic involvement in TV series watching. Summary: In these early stages of research, there is a major need for more consistency and harmonization of constructs and their operationalizations to move forward in the understanding of binge-watching. Just as important, future research should maintain the distinction between high and problematic involvement in binge-watching to avoid overpathologizing this common behavior.

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See detailPsychometric properties of the transaddiction craving triggers questionnaire in alcohol use disorder.
von Hammerstein, Cora; Cornil, Aurelien; Rothen, Stephane; Romo, Lucia; Khazaal, Yasser; Benyamina, Amine; Billieux, Joël; Luquiens, Amandine

in International journal of methods in psychiatric research (2020), 29

OBJECTIVES: We aimed to develop the transaddiction craving triggers questionnaire (TCTQ), which assesses the propensity of specific situations and contexts to trigger craving and to test its psychometric properties in alcohol use disorder (AUD). METHODS: This study included a sample of 111 AUD outpatients. We performed exploratory factor analysis (EFA) and calculated item-dimension correlations. Internal consistency was measured with Cronbach's alpha coefficient. Construct validity was assessed through Spearman correlations with craving, emotional symptoms, impulsivity, mindfulness, and drinking characteristics. RESULTS: The EFA suggested a 3-factor solution: unpleasant affect, pleasant affect, and cues and related thoughts. Cronbach's coefficient alpha ranged from .80 to .95 for the three factors and the total score. Weak positive correlations were identified between the TCTQ and drinking outcomes, and moderate correlation were found between the TCTQ and craving strength, impulsivity, anxiety, depression, and impact of alcohol on quality of life. CONCLUSIONS: The 3-factor structure is congruent with the well-established propensity of emotions and cues to trigger craving. Construct validity is supported by close relations between the TCTQ and psychological well-being rather than between the TCTQ and drinking behaviors. Longitudinal validation is warranted to assess sensitivity to change of the TCTQ and to explore its psychometric properties in other addictive disorders.

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See detailToo good to be cautious: High implicit self-esteem predicts self-reported dangerous mobile phone use
Lannoy, Séverine; Chatard, Armand; Selimbegovic, Leila; Tello, Nina; Linden, Martial Van Der; Heeren, Alexandre; Billieux, Joël

in Computers in Human Behavior (2020), 103

Mobile phone use and misuse have become a pressing challenge in today's society. Dangerous mobile phone use, such as the use of a mobile phone while driving, is widely practiced, though banned in several jurisdictions. Research aiming at unfolding the psychological predictors of dangerous mobile phone use have so far been scarce. Especially, researchers have never taken the role of self-esteem into account, which is unfortunate given prior research linking self-esteem to addictive mobile phone use. In the present study, we evaluated the associations between both explicit and implicit self-esteem and dangerous mobile phone use, with a particular focus on phoning while driving. To do so, we assessed implicit self-esteem among 95 participants (89 females) via the Implicit Association Test and explicit self-esteem via a self-reported measure. Problematic mobile phone use and demographic data were assessed with self-reported measures. Implicit self-esteem predicted dangerous mobile phone use, even after we controlled for demographic data and mobile phone dependence. Explicit self-esteem, however, was related to neither dependence nor dangerous use of the mobile phone, thereby supporting the importance of distinguishing between explicit and implicit self-esteem. Our results set the scene for new research avenues regarding mobile phone use while driving.

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See detailThe joint role of impulsivity and distorted cognitions in recreational and problem gambling: A cluster analytic approach.
Devos, Mr Gaetan; Clark, Luke; Bowden-Jones, Henrietta; Grall-Bronnec, Marie; Challet-Bouju, Gaelle; Khazaal, Yasser; Maurage, Pierre; Billieux, Joël

in Journal of affective disorders (2020), 260

BACKGROUND AND AIMS: The Pathways Model (Blaszczynski & Nower, 2002) posits that problem gambling is a heterogeneous disorder with distinct subgroups (behaviorally conditioned gamblers, emotionally vulnerable gamblers, and antisocial-impulsivist gamblers). Impulsivity traits and gambling-related cognitions are recognized as two key psychological factors in the onset and maintenance of problem gambling. To date, these constructs have been explored separately, and their joint role in determining problem gambling subtypes has received little attention. The goal of our study was to identify subgroups of gamblers based on impulsivity traits and gambling-related cognitions, and to determine whether this approach is consistent with the Pathways model. METHODS: Gamblers from the community (N=709) and treatment-seeking pathological gamblers (N=122) completed questionnaires measuring gambling habits, disordered gambling symptoms, gambling-related cognitions, and impulsivity traits. RESULTS: Cluster analyses revealed that three clusters globally aligned with the pathways proposed by Blaszczynski & Nower (2002). Two other clusters emerged: (1) impulsive gamblers without cognitive-related cognitions; and (2) gamblers without impulsivity or gambling-related cognitions. Gamblers with both heightened impulsive traits and gambling-related cognitions had more severe problem gambling symptoms. CONCLUSION: We successfully identified, based on an a priori theoretical framework, different subtypes of gamblers that varied in terms of problem gambling symptoms and clinical status. The diversity of the cluster profiles supports the development of personalized prevention strategies and psychological interventions.

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See detailLearning to lose control: A process-based account of behavioral addiction.
Perales, Jose C.; King, Daniel L.; Navas, Juan F.; Schimmenti, Adriano; Sescousse, Guillaume; Starcevic, Vladan; van Holst, Ruth J.; Billieux, Joël

in Neuroscience and biobehavioral reviews (2020), 108

Learning psycho(bio)logy has developed a solid corpus of evidence and theory regarding behavior control modes. The present article briefly reviews that literature and its influence on recent models in which the transition from goal-directed to compulsive behavior is identified as the main process underlying substance use disorders. This literature is also relevant to non-substance addictive disorders, and serves as basis to propose a restricted definition of behavioral addiction relying on the presence of behavior-specific compulsivity. Complementarily, we consider whether some activities can become disordered while remaining mostly goal-driven. Based on reinforcement learning models, relative outcome utility computation is proposed as an alternative mechanism through which dysfunctional behaviors (even not qualifying as addictive) can override adaptive ones, causing functional impairment. Beyond issues of conceptual delimitation, recommendations are made regarding the importance of identifying individual etiological pathways to dysregulated behavior, the necessity of accurately profiling at-risk individuals, and the potential hazards of symptom-based diagnosis. In our view, the validity of these recommendations does not depend on the position one takes in the nosological debate.

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See detailTowards a cross-cultural assessment of binge-watching: Psychometric evaluation of the “watching TV series motives” and “binge-watching engagement and symptoms” questionnaires across nine languages
Flayelle, Maèva; Castro-Calvo, Jesús; Vögele, Claus; Astur, Robert; Ballester-Arnal, Rafael; Challet-Bouju, Gaëlle; Brand, Matthias; Cárdenas, Georgina; Devos, Gaëtan; Elkholy, Hussien; Grall-Bronnec, Marie; James, Richard J. E.; Jiménez-Martínez, Martha; Khazaal, Yasser; Valizadeh-Haghi, Saeideh; King, Daniel; Liu, Yueheng; Lochner, Christine; Steins-Loeber, Sabine; Long, Jiang; Potenza, Marc N.; Rahmatizadeh, Shahabedin; Schimmenti, Adriano; Stein, Dan J.; Tóth-Király, István; Tunney, Richard; Wang, Yingying; Zhai, Zu Wei; Maurage, Pierre; Billieux, Joël

in Computers in Human Behavior (2020), 111

In view of the growing interest regarding binge-watching (i.e., watching multiple episodes of television (TV) series in a single sitting) research, two measures were developed and validated to assess binge-watching involvement (“Binge-Watching Engagement and Symptoms Questionnaire”, BWESQ) and related motivations (“Watching TV Series Motives Questionnaire”, WTSMQ). To promote international and cross-cultural binge-watching research, the present article reports on the validation of these questionnaires in nine languages (English, French, Spanish, Italian, German, Hungarian, Persian, Arabic, Chinese). Both questionnaires were disseminated, together with additional self-report measures of happiness, psychopathological symptoms, impulsivity and problematic internet use among TV series viewers from a college/university student population (N = 12,616) in 17 countries. Confirmatory factor, measurement invariance and correlational analyses were conducted to establish structural and construct validity. The two questionnaires had good psychometric properties and fit in each language. Equivalence across languages and gender was supported, while construct validity was evidenced by similar patterns of associations with complementary measures of happiness, psychopathological symptoms, impulsivity and problematic internet use. The results support the psychometric validity and utility of the WTSMQ and BWESQ for conducting cross-cultural research on binge-watching.

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See detailNeurocognitive components of gambling disorder: Implications for policy, prevention , and treatment
Navas, Juan F.; Billieux, Joël; Verdejo-Garcia, Antonio; Perales, José C.

in Bowden-Jones, H; Dickson, C; Dunand, C; Simon, O (Eds.) Harm Reduction for Problem Gambling: A Public Health Approach (2019)

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See detailChildhood Emotional Abuse and Cyberbullying Perpetration: The Role of Dark Personality Traits
Kircaburun, Kagan; Jonason, Peter; Griffiths, Mark D.; Aslanargun, Engin; Emirtekin, Emrah; Tosuntaş, Şule B.; Billieux, Joël

in Journal of Interpersonal Violence (2019), 0(0), 0886260519889930

Dark personality traits (i.e., Machiavellianism, psychopathy, narcissism, spitefulness, and sadism) are associated with adverse childhood experiences and deviant online behaviors. However, their mediating role between childhood emotional abuse and cyberbullying has never previously been investigated. We examined direct and indirect associations of childhood emotional abuse and cyberbullying via dark personality traits among 772 participants. Men were better characterized by dark personality traits and were more likely to engage in cyberbullying than women, and there were no sex differences in childhood emotional abuse. Collectively, dark traits fully mediated the relationship between childhood emotional abuse and cyberbullying in men, with partial mediation in the total sample and women. More specifically, Machiavellianism and spitefulness were mediators in both samples, sadism was a mediator in men and the total sample, and psychopathy was a mediator in the total sample and women. The dark personality traits can account for the association between childhood emotional abuse and cyberbullying, especially among men.

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See detailChildhood Emotional Maltreatment and Problematic Social Media Use Among Adolescents: The Mediating Role of Body Image Dissatisfaction
Kircaburun, Kagan; Griffiths, Mark D.; Billieux, Joël

in International Journal of Mental Health and Addiction (2019), 18(6), 1536-1547

Preliminary evidence suggests that childhood maltreatment is associated with higher problematic social media use (PSMU). It has also been established that childhood emotional maltreatment (CEM) is associated with body image dissatisfaction (BID). However, the direct and indirect impacts of CEM on PSMU via BID remain untested. The present study examined these direct and indirect relationships among a sample of 385 adolescents (mean age 15.62 years, range 14–18 years). Results indicated that female adolescents had higher levels of CEM, BID, and PSMU compared to males. Structural equation modeling indicated that CEM was indirectly associated with PSMU via BID among males. However, only BID was positively associated with PSMU among females. The findings are in accordance with theoretical models suggesting that individuals’ core characteristics including early childhood experiences and psychopathological factors are associated with different types of specific internet-use disorders.

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See detailBeyond information overload and stress: A plea to acknowledge the complexity of problematic Internet use and consider individualized intervention strategies
Flayelle, Maèva; Starcevic, Vladan; Billieux, Joël

in Current Psychiatry Research and Reviews (2019), 15(1), 72-73

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See detailStudy what makes games addictive.
King, Daniel; Koster, Ernst; Billieux, Joël

in Nature (2019), 573(7774), 346

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See detailDoes change in attention control mediate the impact of tDCS on attentional bias for threat? Limited evidence from a double-blind sham-controlled experiment in an unselected sample
Coussement, Charlotte; Maurage, Pierre; Billieux, Joël; Heeren, Alexandre

in Psychologica Belgica (2019), 59(1), 16-32

Neurocognitive models of attentional bias for threat posit that attentional bias may result from a decreased activation of the left prefrontal cortex, and especially of its dorsolateral part (dlPFC), resulting in an impaired attention control. Consequently, a transient increase of neural activity within the left dlPFC via non-invasive brain stimulation reduces attentional bias among both anxious and nonanxious participants. Yet, it is still unclear whether the impact of dlPFC activation on attentional bias is mediated by improvement in attention control. In this experiment, we sought to test this hypothesis in an unselected sample (n = 20). Accordingly, we adopted a double-blind within-subject protocol in which we delivered a single-session of anodal versus sham transcranial Direct Current Stimulation (tDCS) over the left dlPFC during the completion of a task assessing attention control. We also assessed its subsequent impact on attentional bias. Neither attention control nor attentional bias did significantly improve following anodal tDCS. Although our results did not support our main hypothesis, we believe the present null results to be particularly useful for future meta-research in the field. We also formulated a series of methodological recommendations for future research aiming at testing the tDCS-induced modification of attentional bias.

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See detailOvercoming the unitary exploration of binge-watching: A cluster analytical approach.
Flayelle, Maèva; Maurage, Pierre; Karila, Laurent; Vögele, Claus; Billieux, Joël

in Journal of behavioral addictions (2019), 8(3), 586-602

BACKGROUND AND AIMS: Binge-watching (i.e., watching multiple episodes of a TV series in one session) has recently become standard practice among TV series viewers; this expansion generates concerns regarding the potential negative outcomes associated with this habit. However, the investigation of its psychological correlates remains fragmentary, with few initial studies a priori conceptualizing this behavior as a new addictive disorder. This study explored these psychological correlates using cluster analysis of binge-watching behavior based on three key psychological factors: motivations, impulsivity, and emotional reactivity. METHODS: An online survey was completed by 4,039 TV series viewers. Data were analyzed using hierarchical and non-hierarchical cluster analyses, the validity of the clusters being finally determined through mutual comparisons with a selection of external correlates. RESULTS: Four clusters were identified: recreational TV series viewers (presenting low involvement in binge-watching), regulated binge-watchers (moderately involved), avid binge-watchers (presenting elevated but non-problematic involvement), and unregulated binge-watchers (presenting potentially problematic involvement associated with negative outcomes). DISCUSSION AND CONCLUSIONS: This study underlines the heterogeneous and multidetermined nature of binge-watching. Our findings suggest that high engagement in binge-watching is distinct from problematic binge-watching, thus reinforcing the notion that conceptualizing binge-watching as an addictive disorder is of low relevance and might actually lead to the overpathologization of this highly popular leisure activity.

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See detailTrait emotional intelligence and problematic online behaviors among adolescents: The mediating role of mindfulness, rumination, and depression
Kircaburun, Kagan; Griffiths, Mark D.; Billieux, Joël

in Personality and Individual Differences (2019), 139

Preliminary studies have shown that trait emotional intelligence (trait EI) can be a risk factor for higher problematic use of specific online activities. However, the possible mediating role of mindfulness and rumination on the relationship of trait EI with problematic social media use (PSMU) and problematic online gaming (POG) is unclear. Among a sample of 470 adolescents, the present study examined the direct and indirect associations of trait EI with PSMU and POG and the potential mediational role of mindfulness, rumination, and depression while controlling for gender and age. Multiple mediation analyses indicated that trait EI was indirectly associated with PSMU via mindfulness, rumination, and depression, and with POG via mindfulness and rumination. Furthermore, rumination affected PSMU positively. The study provides empirical evidence of the theoretical assumption that different types of specific problematic online behaviors are related to both shared and specific risk factors.

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See detailBehavioral and cerebral impairments associated with binge drinking in youth: A critical review
Lannoy, Séverine; Billieux, Joël; Dormal, Valerie; Maurage, Pierre

in Psychologica Belgica (2019), 59(1), 116155

Binge drinking is a widespread alcohol consumption pattern in youth that is linked to important behavioral and cerebral impairments, in both the short and the long term. From a critical review of the current literature on this topic, we conclude that binge drinkers display executive impairments, cerebral modifications, and problems with emotion-related processes. Five key empirical and theoretical topics are discussed to pave the way for future research in the field: (1) the specificity of the brain modifications observed in binge drinkers that may index a compensatory mechanism or result from multiple withdrawals; (2) the nature of the relationship between binge drinking and impairments, suggesting reciprocal influences between excessive alcohol consumption and executive deficits; (3) the possible recovery of brain and cognitive functioning after the cessation of binge drinking; (4) the validity of the continuum hypothesis, suggesting links between binge drinking and severe alcohol use disorders; and (5) the existing strategies to reduce binge drinking habits or rehabilitate the associated cognitive deficits. Future perspectives are described in relation to the questions raised to identify the crucial variables to be addressed in research and clinical practice.

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See detailEnhancement motivation to drink predicts binge drinking in adolescence: a longitudinal study in a community sample
Lannoy, Séverine; Dormal, Valérie; Billieux, Joël; Maurage, Pierre

in American Journal of Drug and Alcohol Abuse (2019), 45(3), 304-312

Background: Binge drinking, characterized by alternations between intense alcohol intakes and abstinence periods, is the most frequent alcohol consumption pattern among adolescents and has been repeatedly associated with cognitive and cerebral impairments. Objectives: In view of these harmful consequences, it appears crucial to disentangle the psychological factors involved in the emergence of binge drinking in adolescence, and centrally the role played by drinking motives, which have been strongly related to binge drinking habits. Methods: Using a longitudinal design, the present study explored the role of drinking motives (i.e. social order, conformity, enhancement, coping) in the emergence of binge drinking among young adolescents from the community. One hundred and forty-four young adolescents (81 girls) took part in a research assessing alcohol consumption and drinking motives at two assessment times (T1 and T2), with a one-year interval. After data checking, 101 adolescents (57 girls) aged from 12 to 15 years old were included in the study. Results: Correlations showed strong relationships between drinking motives and binge drinking. Additional regression analyses were then computed to determine how drinking motives assessed at T1 predicted binge drinking at T2, while controlling for global alcohol use. Results showed that the statistical model explained 60% of the binge drinking variance. In particular, the enhancement motivation, which is related to the search for the enjoyable sensations felt when drinking alcohol, constituted the unique predictor of future binge drinking. Conversely, in contrast with previous studies, social motives did not predict binge drinking in young adolescents. Conclusion: These findings highlight the central role of enhancement motivation (e.g., focusing on the positive expectancies towards alcohol) in youths’ alcohol consumption and call for the development of preventive interventions. It also suggests that the previously reported relationship between social motives and college drinking does not seem to play a key role in the early steps of binge drinking habits.

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See detailExamining neural reactivity to gambling cues in the age of online betting
Brevers, Damien; Sescousse, Guillaume; Maurage, Pierre; Billieux, Joël

in Current Behavioral Neuroscience Reports (2019), 6(3), 59-71

Purpose of Review The goal of this review is to provide new insights as to how and why functional magnetic resonance imaging (fMRI) research on gambling cue reactivity can contribute to significant progress toward the understanding of gambling disorder. After having offered a detailed description of experimental paradigms and a comprehensive summary of findings related to gambling cue reactivity, the present review suggests methodological avenues for future research.Recent Findings The fMRI literature on problem gambling has identified the main neural pathways associated with reactivity to gambling cues. Yet, the current knowledge on the key factors underlying cue reactivity in gambling is still very incomplete. Here, we suggest that the recent expansion of online sports betting calls for a new line of research offering a fine-grained and up-to-date approach of neural cue reactivity in gambling disorder.Summary Experimental designs that investigate individual-specific and study-specific factors related to sports betting have the potential to foster progress toward efficient treatment and prevention of gambling disorder.

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See detailLet’s Open the Decision-Making Umbrella: A Framework for Conceptualizing and Assessing Features of Impaired Decision Making in Addiction
Rochat, Lucien; Maurage, Pierre; Heeren, Alexandre; Billieux, Joël

in Neuropsychology Review (2019), 29(1), 27-51

Decision-making impairments play a pivotal role in the emergence and maintenance of addictive disorders. However, a sound conceptualization of decision making as an umbrella construct, encompassing its cognitive, affective, motivational, and physiological subcomponents, is still lacking. This prevents an efficient evaluation of the heterogeneity of decision-making impairments and the development of tailored treatment. This paper thus unfolds the various processes involved in decision making by adopting a critical approach of prominent dual- or triadic-process models, which postulate that decision making is influenced by the interplay of impulsive-automatic, reflective-controlled, and interoceptive processes. Our approach also focuses on social cognition processes, which play a crucial role in decision making and addictive disorders but were largely ignored in previous dual- or triadic-process models. We propose here a theoretical framework in which a range of coordinated processes are first identified on the basis of their theoretical and clinical relevance. Each selected process is then defined before reviewing available results underlining its role in addictive disorders (i.e., substance use, gambling, and gaming disorders). Laboratory tasks for measuring each process are also proposed, initiating a preliminary process-based decision-making assessment battery. This original approach may offer an especially informative view of the constitutive features of decision making impairments in addiction. As prior research has implicated these features as risk factors for the development and maintenance of addictive disorders, our processual approach sets the scene for novel and transdiagnostic experimental and applied research avenues

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See detailTime for a Plot Twist: Beyond Confirmatory Approaches to Binge-Watching Research
Flayelle, Maèva; Maurage, Pierre; Vögele, Claus; Karila, Laurent; Billieux, Joël

in Psychology of Popular Media Culture (2019), 8(3), 308-318

The advent of the digital age with its progress in digital technology has been associated in recent years with an increase in binge-watching (i.e., seeing multiple episodes of the same TV series in one session). Binge-watching has now become the new normative way to consume TV shows. Nevertheless, along with its recent massive rise has come concerns about the associated mental and physical health outcomes. Currently available results suggest the potential harmfulness and even addictive nature of binge-watching. The psychological investigation of this behavior, however, is still in its infancy, with most studies using a confirmatory approach and assuming a priori its genuine addictive nature. In contrast, the current perspective paper argues the case for an exploratory approach as an initial step for conducting research on behaviors that − at first sight − look like addiction when applying a symptom-based approach. A qualitative understanding of the phenomenological characteristics of binge-watching as the foundation of an initial comprehensive discussion makes it possible to formulate hypotheses concerning its potentially addictive nature and to emphasize challenges and directions for future research. Here we propose an exploration of the dynamics of binge-watching behavior based on a model involving emotion regulation in the etiology and maintenance of problem binge-watching.

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See detailWhere the mind cannot dare: a case of addictive use of online pornography and its relationship with childhood trauma.
Wéry; Schimmenti, Adriano; Karila, Laurent; Billieux, Joël

in Journal of Sex and Marital Therapy (2019), 45(2), 114-127

Dysfunctional use of cybersex has often been conceptualized as a 'behavioral addiction' sharing common traits with substance addiction. We describe the case of a treatment-seeking man, who displayed addictive use of pornography. The case is presented from two perspectives: (1) a symptom-based approach inspired by the addiction model of excessive sexual behaviors and (2) a process-based approach aimed to identify the psychological processes and risk factors that may foster the development of addiction-like symptoms. This article shows how case conceptualization according to a process-based approach is likely to result in psychological intervention that targets the specific processes and risk factors involved in addictive cybersex use.

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See detailA joint exploration of executive subcomponents in binge drinking
Lannoy, Séverine; Dormal, Valérie; Billieux, Joël; Maurage, Pierre

in Addiction Research and Theory (2019), 27(6), 498-506

Background: Executive deficits have been largely reported in young binge drinkers during the last decade, but uncertainty remains regarding the specificity of these deficits and their variation across executive subcomponents. The current study aimed at offering a theoretically-grounded and specific exploration of the differential deficits observed across executive functions in binge drinkers. Method: A total of forty university students (20 binge drinkers; 10 women, and 20 matched controls; 12 women) performed three validated neuropsychological tasks, each exploring a specific executive function, namely shifting, updating, and inhibition (specifically Resistance to Distractor Interference). Tasks were presented to participants in pseudo-randomized order. Repeated measure analyses of variance were performed for each task to compare groups’ performance. Results: A dissociation was observed across executive tasks regarding group differences: compared to controls, binge drinkers demonstrated preserved performance for shifting and updating abilities, but impaired inhibition. These results support the central role of inhibitory control in excessive alcohol consumption. In contrast with severe alcohol-use disorders, binge drinking does not appear related to a general executive deficit. Conclusions: In view of the pivotal role played by inhibition impairments in the emergence of severe alcohol-use disorders, the present data claim for developing individualized evaluation and rehabilitation programs focusing on this executive subcomponent to improve control abilities at early stages of alcohol-related disorders.

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See detailPsychosocial factors mediating the relationship between childhood emotional trauma and Internet gaming disorder: A pilot study
Kircaburun, Kagan; Griffiths, Mark D.; Billieux, Joël

in European Journal of Psychotraumatology (2019), 10

gaming disorder (IGD) has been related to a wide range of detrimental psychological and health consequences. The purpose of the present pilot study was to test the direct and indirect relationships between IGD and emotional trauma, body image dissatisfaction, social anxiety, loneliness, depression, and self-esteem. A total of 242 online gamers completed a survey comprising a comprehensive battery of psychometric self-report scales concerning aforementioned variables. Results indicated that IGD was significantly correlated with all the variables except for body image dissatisfaction. Path analysis indicated an indirect relationship between childhood emotional trauma and IGD through depressive symptoms, while adjusting for gender, age, and number of hours gaming. The findings of the present study indicate that online gamers with a history of emotional abuse and/or neglect have higher levels of depressive symptoms, and that depressive symptoms are important risk factors of IGD.

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See detailHigh involvement versus pathological involvement in video games: A crucial distinction for ensuring the validity and utility of gaming disorder
Billieux, Joël; Flayelle, Maèva; Rumpf, Hans-Jürgen; Stein, Dan J.

in Current Addiction Reports (2019), 6(3), 323-330

Purpose of review. The year 2018 was marked by the official recognition of Gaming Disorder (GD) as a mental condition with its inclusion in the proposed eleventh edition of the International Classification of Diseases (ICD-11). Recently, a group of scholars has repeatedly criticized the notion of GD proposed by the World Health Organization (WHO), arguing that its inclusion in ICD-11 will pathologize highly involved but healthy gamers. It is therefore of crucial importance to clarify the characteristics of high involvement versus pathological involvement in video games, the boundaries between these constructs, and the implementation of screening and diagnostic GD tools that distinguish the two. Recent findings. Increasing evidence supports the view that intense video game playing may involve patterns of gaming that are characterized by high involvement but that are non-pathological. Furthermore, some criteria for addictive and related disorders may reflect peripheral features that are not necessarily indicative of pathology, whereas others may reflect core features that are more likely to adequately identify pathological behavior and so have diagnostic validity. Finally, it is key to assess functional impairment associated with gaming, so that a GD diagnosis has clinical utility. Summary. Available evidence supports the crucial need to distinguish between high and pathological involvement in videogames, in order to avoid over-diagnosis and pathologization of normal behavior. The definition of GD adopted in ICD-11 has clinical utility and diagnostic validity since it explicitly mentions the functional impairment caused by problem gaming and its diagnostic guidelines refer to core addiction features, reflecting pathological involvement.

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See detailProblematic smartphone use: An empirically validated model
Pivetta, Erika; Harkin, Lydia; Billieux, Joël; Kanjo, Eiman; Kuss, Daria J.

in Computers in Human Behavior (2019), 100

Given the prominent role that smartphones have in everyday life, research in the field has proliferated. From a theoretical perspective, problematic smartphone use (PSPU) is described as a multi-faceted phenomenon entailing a variety of dysfunctional manifestations (e.g., addictive, antisocial and dangerous use). To date, however, there is still a lack of empirical evidence supporting the identification of PSPU as a potential behavioural addiction. Driven by theory, the aim of the present study was to provide an empirically validated model by testing the contribution of specific factors leading to PSPU. Relationships among individual characteristics (internalised psychopathology, impulsivity and personality traits) and PSPU uses (addictive, antisocial and dangerous) were investigated according to the updated version of the theoretical framework provided by the Pathway Model of problematic smartphone use (Billieux et al., 2015). An online survey was administered to a convenience sample (N = 511) of smartphone users in order to examine their daily engagement, problematic usage patterns and related psychological correlates. Path analysis revealed important information about different PSPU components and results are discussed in light of the available literature. Recommendations for future research are proposed to further investigate the problematic behaviour, including the study of additional variables, such as the fear of missing out (FoMO), nomophobia and excessive social media use.

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See detailAssessing binge-watching behaviors: Development and validation of the “Watching TV Series Motives” and “Binge-Watching Engagement and Symptoms” questionnaires
Flayelle, Maèva; Canale, Natale; Vögele, Claus; Karila, Laurent; Maurage, Pierre; Billieux, Joël

in Computers in Human Behavior (2019), 90

The widespread practice of binge-watching (i.e. watching multiple episodes of a TV series in one session) recently generated concerns about associated negative outcomes. Its psychological investigation, however, remains fragmentary. Based on the previous phenomenological investigation of TV series watching, we developed and validated two original assessment instruments, assessing TV series watching motives and binge-watching engagement and symptoms, respectively. Preliminary items were created for each questionnaire, and a focus group with TV series viewers was conducted and analyzed to generate the final instruments. The questionnaires were then administered via an online survey (N=6556), together with complementary measures of affect, problematic Internet use and substance use. Exploratory and confirmatory factor analyses, along with correlational analyses, were performed to examine both structural and external validity of the scales. The factorial analyses resulted in a 4-factor model (i.e. emotional enhancement, enrichment, coping-escapism and social) for the Watching TV Series Motives Questionnaire (WTSMQ), and in a 7-factor model (i.e. engagement, positive emotions, desire-savoring, pleasure preservation, binge-watching, dependency and loss of control) for the Binge-Watching Engagement and Symptoms Questionnaire (BWESQ). The results suggest good psychometric properties for both scales. The current study thus provides theoretically-driven and psychometrically sound instruments for further research on binge-watching behaviors

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See detailEscaping reality through videogames is linked to an implicit preference for virtual over real-life stimuli
Deleuze, Jory; Maurage, Pierre; Schimmenti, Adriano; Nuyens, Filip; Melzer, André; Billieux, Joël

in Journal of Affective Disorders (2019), 245

From the theory of compensatory Internet use, escapism through videogames may constitute a coping strategy that is sometimes helpful but, in some cases, maladaptive. Yet, evidence supporting this view has, to date, been gathered only through the use of explicit self-reported questionnaires, which are known to be biased. Accordingly, the aim of the current study was to test whether the escapism motive is related to a preference for the virtual environment. Method. A laboratory task that allowed the measurement of implicit attitudes, namely, the Affect Misattribution Procedure was created with stimuli from real world and videogames. The task was administered online with a series of questionnaire and completed by 273 online gamers from the community. Results. The results showed that participants had more positive attitudes toward pictures depicting virtual environments than toward those depicting real environments. Furthermore, those participants who frequently used videogames to escape real life and were highly engaged in video gaming had a more pronounced positive implicit attitude toward the virtual environment. Discussion. This study contributes to a better understanding of the psychological processes underlying escapism in videogames and calls for a refinement of the escapism construct, which can be related to both problematic (i.e., potential coping strategy) and nonproblematic patterns of videogame use. Among the limitations, it should be noted that the selection of stimuli related to videogames is restricted to one genre of game, and that the participants’ environment could not be controlled due to the online design.

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See detailProbing gambling urge as a state construct: Evidence from a sample of community gamblers
Canale, Natale; Cornil, Aurélien; Giroux, Isabelle; Bouchard, Stéphane; Billieux, Joël

in Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors (2019), 33(2), 154-161

Little effort has been made to systematically test the psychometric properties of the Gambling Craving Scale (GACS; Young & Wohl, 2009). The GACS is adapted from the Questionnaire on Smoking Urges (Tiffany & Drobes, 1991) and thus measures gambling-related urge. Crucially, the validation of scales assessing gambling urge is complex, as this construct is better conceptualized as a state (a transient and context-determined phenomenon). In the present study, we tested the psychometric properties of the French version of the GACS with 2 independent samples of community gamblers following an induction procedure delivered through an audio-guided imagery sequence aimed at promoting gambling urge. This procedure was specifically used to ensure the assessment of gambling urge as a state variable. Participants also completed measures of gambling severity, gambling cognitions and motives, impulsivity, and affect. Confirmatory factor analysis (CFA) showed that the original 3-factor solution (anticipation, desire, relief) did not fit the data well. Additional exploratory factor analysis (EFA) suggested instead a 2-factor solution: intention and desire to gamble dimension and a relief dimension. The factorial structure resulting from the EFA was tested with CFA in a second independent sample, resulting in an acceptable fit. The 2 dimensions presented good internal reliability and correlated differentially with the other study’s variables. The current study showed that, similar to what has been reported for substance-related urges, gambling urges are adequately probed with a bidimensional model. The findings suggest that the French GACS has good psychometric properties, legitimizing its use in research and clinical practice.

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See detailIs there room for attentional impairments in binge drinking? A commentary on Carbia et al. (2018).
Lannoy, Severine; Heeren, Alexandre; Dormal, Valerie; Billieux, Joël; Maurage, Pierre

in Neuroscience and biobehavioral reviews (2019), 98

Binge drinking is an excessive pattern of alcohol use, highly prevalent in adolescents and young adults. Several studies have explored the cognitive impairments associated with binge drinking, and Carbia et al. (2018) recently proposed a systematic review of these impairments. Although this review offers an insightful and up-to-date synthesis of this research field, the authors concluded that binge drinking is not associated with attentional impairments. We argue that such conclusion is premature. We identified published studies not mentioned by Carbia et al. (2018), which documented attentional impairments in binge drinking. In particular, a differential exploration of attentional networks has suggested that binge drinkers not only exhibit impairments for the executive control of attention, but also for its alerting network. We thus recommend a better consideration of attention in future experimental and translational research agendas.

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See detailImpulsivity and Binge Drinking: A Neurocognitive Perspective (chapter 35)
Maurage, Pierre; Lannoy, Séverine; Naassila, Mickael; Rolland, Benjamin; Billieux, Joël

in Preedy, Victor R. (Ed.) Neuroscience of Alcohol (2019)

Binge drinking (BD), an alcohol-consumption pattern characterized by frequent alternations between intense intakes and withdrawal periods, is a widespread habit in youth. It has been shown that BD is linked to impairments in psychological, cognitive, and cerebral abilities. Previous studies notably underlined that impulsivity-related mechanisms might play a pivotal role in the emergence and maintenance of BD. This chapter underlines the importance of impulsivity in BD, by proposing a literature review organized around a theoretical framework distinguishing four impulsivity subcomponents (urgency, lack of premeditation, lack of perseverance, and sensation seeking) and by identifying the (neuro-)psychological and cerebral correlates of each subcomponent. Then, the main challenges for future research are discussed, particularly underlining the need for a multidisciplinary approach to explore the links between impulsivity and other cognitive factors, the causal relationships between BD and impulsive subcomponents, and the interindividual variations of impulsive tendencies in BD.

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See detailDisrupted Fear and Sadness Recognition in Binge Drinking: A Combined Group and Individual Analysis
Lannoy, Severine; Benzerouk, Farid; Maurage, Pierre; Barriere, Sarah; Billieux, Joël; Naassila, Mickael; Kaladjian, Arthur; Gierski, Fabien

in Alcoholism, clinical and experimental research (2019), 43(9), 1978-1985

BACKGROUND: Binge drinking is a harmful pattern of alcohol consumption, associated with cognitive and cerebral impairments. Indeed, various cognitive processes have been identified as disrupted in binge drinking, ranging from perceptive to executive functions, but emotional processes have conversely been little investigated. Particularly, it is unclear to what extent binge drinkers (BD) present difficulties to recognize and categorize the emotions expressed by other individuals. Such an exploration would, however, offer a more comprehensive view of the deficits associated with alcohol-related disorders and potentially involved in the maintenance of this harmful habit. METHODS: Fifty-two BD and 42 control participants performed an emotional task assessing the ability to recognize 6 basic emotions (i.e., anger, contempt, disgust, fear, happiness, and sadness). Accuracy score and detection threshold were collected for each emotion. To explore the extent of emotion recognition difficulties, 2 analyses were conducted: (i) classical repeated measures analyses of variance, to compare groups' performance, and (ii) multiple single-case analyses (i.e., Crawford's t-tests), to determine the percentage of BD presenting genuine emotion recognition deficits. Correlations were also performed between alcohol consumption characteristics and emotional recognition scores. RESULTS: BD presented reduced performance for the recognition of fear and sadness. Multiple single cases highlighted that these deficits respectively concerned 21.15 and 15.38% of the binge drinking sample, and the relation between binge drinking and reduced sadness detection was supported by correlational analyses. CONCLUSIONS: These findings show that binge drinking is associated with a disrupted processing of emotional stimuli. By identifying heterogeneity in the impairments presented by BD, the present results also underline the usefulness of a combined group and individual approach.

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See detailNew synthetic opioids: Part of a new addiction landscape.
Karila, Laurent; Marillier, Maude; Chaumette, Boris; Billieux, Joël; Nicolas, Franchitto; Amine, Benyamina

in Neuroscience and biobehavioral reviews (2019), 106

Synthetic opioids (SO) are a major risk for public health across the world. These drugs can be divided into 2 categories, pharmaceutical and non-pharmaceutical fentanyls. A new generation of SO has emerged on the drug market since 2010. North America is currently facing an opioid epidemic of morbi-mortality, caused by over-prescription of opioids, illegally diverted prescribed medicines, the increasing use of heroin, is and the emergence of SO. Furthermore, this opioid crisis is also seen in Europe. SO are new psychoactive substances characterized by different feature such as easy availability on the Internet, low price, purity, legality, and lack of detection in laboratory tests. They have not been approved or are not recommended for human use. Opioid misuse is associated with somatic and psychiatric complications. For many substances, limited pharmacological information is available, increasing the risk of harmful adverse events. Health actors and the general population need to be clearly informed of the potential risks and consequences of the diffusion and use of SO.

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See detailThe gambling craving experience questionnaire: Psychometric properties of a new scale based on the elaborated intrusion theory of desire
Cornil, Aurélien; Long, Jiang; Rothen, Stéphane; Perales, José C.; de Timary, Philippe; Billieux, Joël

in Addictive Behaviors (2019), 95

Both research and clinical practice acknowledge the importance of craving as a maintenance and relapse factor in gambling disorder. The elaborated intrusion theory (EIT; Kavanagh et al., 2005) of desire has been extensively investigated in relation to psychoactive substance or food cravings but, to date, has scarcely been studied in relation to gambling. In such a context, developing an assessment tool of gambling craving based on the EIT is warranted. To fill this gap in the literature, we aimed to develop and test the psychometric properties of a gambling-adapted version of the Craving Experience Questionnaire (CEQ; May et al., 2014), which is the best established measure of craving theoretically anchored in the EIT. An online survey that included the gambling CEQ (g-CEQ) and a craving induction procedure was administered to 274 community participants involved in gambling at least a few times a year. Concurrent and convergent validity were explored through correlations with a scale that measured gambling urge and with a series of questionnaires that measured disordered gambling symptoms, gambling cognitions, and gambling motives. The confirmatory factor analyses supported the validity of the expected three-factor model of the “strength” and “frequency” forms of the g-CEQ and showed better model fit than a one-factor solution, corroborating the initial structure of the CEQ. Furthermore, the scale has good internal consistency and its validity is supported by correlations with gambling-related constructs. The g-CEQ is thus a theoretically and psychometrically sound instrument to measure gambling craving based on the EIT.

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See detailDissociation in Problematic Gaming: a Systematic Review
Guglielmucci, Fanny; Monti, Massimiliano; Franzoi, Isabella G.; Santoro, Gianluca; Granieri, Antonella; Billieux, Joël; Schimmenti, Adriano

in Current Addiction Reports (2019), 6(1), 1-14

Purpose of Review The present article consists of a systematic review of recent (2007–2018) empirical studies addressing the relationship between problematic gaming and dissociation. Nineteen peer-reviewed empirical studies that examined the relationship between problematic gaming and dissociation were identified. Recent Findings The findings suggest that excessive video game use is linked to a variety of dissociative phenomena (e.g. depersonalisation experiences, escapism, psychotic-like experiences, game transfer phenomena). Summary Dissociative experiences are associated with problematic gaming. The findings support the hypothesis that problematic video game use can represent a maladaptive coping strategy onwhich people can rely to escape from disturbing mental states, adverse emotions or real-life problems. In these circumstances, dissociative symptoms might represent the side effects of an alteration in consciousness that is generated by excessive video game use. However, further research (especially experimental and longitudinal) is required in order to establish a potential causal link between problematic gaming patterns and dissociation.

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See detailProblematic video game use as an emotional coping strategy: Evidence from a sample of MMORPG gamers.
Blasi, Maria Di; Giardina, Alessandro; Giordano, Cecilia; Coco, Gianluca Lo; Tosto, Crispino; Billieux, Joël; Schimmenti, Adriano

in Journal of behavioral addictions (2019), 8(1), 25-34

BACKGROUND: A positive relationship between problematic gaming and escapism motivation to play video games has been well established, suggesting that problematic gaming may result from attempts to deal with negative emotions. However, to date, no study has examined how emotion dysregulation affects both escapism motives and problematic gaming patterns. METHODS: Difficulties in emotion regulation, escapism, and problematic involvement with video games were assessed in a sample of 390 World of Warcraft players. A structural equation modeling framework was used to test the hypothesis that escapism mediates the relationship between emotion dysregulation and problematic gaming. RESULTS: Statistical analyses showed that difficulties in emotion regulation predicted both escapism motives and problematic gaming, and that escapism partially mediated this relationship. CONCLUSION: Our findings support the view that problematic players are likely to escape in online games as a maladaptive coping strategy for dealing with adverse emotional experiences.

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See detailThe role of childhood emotional maltreatment and body image dissatisfaction in problematic smartphone use among adolescents
Emirtekin⁠, Emrah; Balta, Sabah; Sural, İrfan; Kircaburun⁠, Kagan; Griffiths, Mark D.; Billieux, Joël

in Psychiatry Research (2019), 271

Growing empirical evidence has identified specific psychological and contextual risk factors associated with problematic smartphone use (PSU). However, the potential direct and indirect impact of childhood emotional maltreatment (CEM) on PSU remains largely unexplored, despite the established role of CEM in the onset of other excessive, problematic, and addictive behaviors. Consequently, the purpose of the present study was to test the direct and indirect relationships of emotional abuse and neglect (two facets of CEM) with PSU via specific mediational pathways including body image dissatisfaction (BID), social anxiety, and depression. The sample comprised 443 adolescents who completed a questionnaire that included assessment tools of aforementioned variables. Multiple mediation model results indicated that CEM was directly and indirectly associated with PSU via BID, depression, BID-related depression, and BID-related social anxiety. Results suggested that emotionally traumatic experiences were associated with PSU in adolescents and that this relationship may partially be explained by BID and psychosocial risk factors. The present study draws caution to the amplifying roles of CEM and BID on increased PSU. The results of the study have important clinical and public health implications, but additional research is needed before interventions can be developed and implemented on the basis of present results.

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See detailUnfair play? Video games as exploitative monetized services: An examination of game patents from a consumer protection perspective
King, Daniel L.; Delfabbro, Paul H.; Gainsbury, Sally M.; Dreier, Michael; Greer, Nancy; Billieux, Joël

in Computers in Human Behavior (2019), 101

ABSTRACT Video games as a consumer product have changed significantly with the advent of in-game purchasing systems (e.g., microtransactions, ‘loot boxes’). This review examines consumer protections related to in-game purchasing by anticipating some of the potential design strategies that might contribute to higher risk consumer behavior. Attention was directed towards the analysis of patents for potential in-game purchasing systems, with 13 identified on Google Patents. The design features were analysed in relation to the consumer rights and guarantees described in the terms of use agreements of the patent assignees. The analysis revealed that some in-game purchasing systems could be characterized as unfair or exploitative. These systems describe tactics that capitalize on informational advantages (e.g., behavioral tracking) and data manipulation (e.g., price manipulation) to optimize offers to incentivize continuous spending, while offering limited or no guarantees or protections (e.g., refund entitlement), with the potential to exploit vulnerable players (e.g., adolescents, problematic gamers). These findings are critically discussed in relation to behavioral economics, addiction psychology, and the clinical conceptualization of gaming disorder. Appropriate policy and consumer protection measures, psychologically informed interventions, and ethical game design guidelines are needed in order to protect the interests and wellbeing of consumers.

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See detailLogic, evidence and consensus: Towards a more constructive debate on gaming disorder.
King, Daniel L.; Delfabbro, Paul H.; Potenza, Marc N.; Demetrovics, Zsolt; Billieux, Joël; Brand, Matthias

in The Australian and New Zealand journal of psychiatry (2019), 53(11), 1047-1049

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See detailMaladaptive player-game relationships in problematic gaming and gaming disorder: A systematic review.
King, Daniel L.; Delfabbro, Paul H.; Perales, Jose C.; Deleuze, Jory; Kiraly, Orsolya; Krossbakken, Elfrid; Billieux, Joël

in Clinical psychology review (2019), 73

While certain player vulnerabilities are known to increase risk of gaming disorder (GD), the topic of maladaptive playerxgame relationships in GD has received limited attention. This review aimed to: (1) identify game types associated with GD symptomatology; and (2) evaluate individual differences (e.g., age, personality, depression) in the relationship between gaming and GD symptomatology. A systematic review of six databases identified 23 studies of the relations between game types and GD, including 13 studies employing multivariate analyses. Player vulnerabilities implicated in GD included impulsivity, risk-taking, psychopathological symptoms (e.g., depression, anxiety), and stronger gaming motivations (e.g., escapism, achievement). MMORPG involvement had the strongest positive association with GD. Problematic MMORPG players tend to have a socially anxious profile and may be attracted to the work-like roles and conventions of this genre. Problematic players of shooters tend to score higher on measures of sensation-seeking and impulsivity than other players. These findings suggest that GD may develop more readily and at more severe levels in complex, endless, socially driven games, irrespective of person-level characteristics. Some player vulnerabilities may selectively increase risk of GD for certain game types. Further research should investigate different player-game interactions to refine current models and interventions for GD.

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See detailEmotion-related impulsivity moderates the cognitive interference effect of smartphone availability on working memory.
Canale, Natale; Vieno, Alessio; Doro, Mattia; Rosa Mineo, Erika; Marino, Claudia; Billieux, Joël

in Scientific reports (2019), 9(1), 18519

Although recent studies suggest that the mere presence of a smartphone might negatively impact on working memory capacity, fluid intelligence, and attentional processes, less is known about the individual differences that are liable to moderate this cognitive interference effect. This study tested whether individual differences in emotion-related impulsivity traits (positive urgency and negative urgency) moderate the effect of smartphone availability on cognitive performance. We designed an experiment in which 132 college students (age 18-25 years) completed a laboratory task that assessed visual working memory capacity in three different conditions: two conditions differing in terms of smartphone availability (smartphone turned off and visible, smartphone in silent mode and visible) and a condition in which the smartphone was not available and was replaced by a calculator (control condition). Participants also completed self-reports that assessed their thoughts after the task performance, positive/negative urgency, and problematic smartphone use. The results showed that participants with higher positive urgency presented increased cognitive interference (reflected by poorer task performance) in the "silent-mode smartphone" condition compared with participants in the "turned-off smartphone" condition. The present study provides new insights into the psychological factors that explain how smartphone availability is liable to interfere with high-level cognitive processes.

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See detailReconsidering the roots, structure, and implications of gambling motives: An integrative approach.
Barrada, Juan R.; Navas, Juan F.; Ruiz de Lara, Cristian M.; Billieux, Joël; Devos, Gaetan; Perales, Jose C.

in PloS one (2019), 14(2), 0212695

RATIONALE AND METHOD: Accurately identifying motives to gamble is crucial in the functional analysis of gambling behavior. In this study, a data-driven approach was followed to clarify the factor structure underlying a pool of motives for gambling, selected from the Gambling Motives Questionnaire-Financial (GMQ-F), and the Reasons for Gambling Questionnaire (RGQ), in a sample of regular problem and non-problem gamblers. Additionally, the role of gambling motives in the relationship between root behavioral activation/inhibition systems (BIS/BAS) and gambling severity, frequency, and preferences was explored using structural equation modelling (SEM). RESULTS AND CONCLUSIONS: The present study identified Social, Financial, and Fun/thrill-related gambling motives factors, but also a fourth factor in which some positive and negative reinforcement-based motives were grouped into a single and broader Affect regulation factor. This Affect regulation factor shared variance both with BIS and BAS-related measures, and was the only direct predictor of disordered gambling symptoms. The Fun/thrill factor was directly related to frequency of participation in high-arousal, skill-based games, and all factors were related to participation in lower-arousal, chance games (with Social motives negatively predicting both participation in the latter and total severity). In the SEM model, measures of BIS/BAS sensitivity were connected to gambling behavior only through gambling motives. Based on measures of items' specificity, a shortened Spanish scale (the brief Gambling Motives Inventory, bGMI) is proposed to assess gambling motives in accordance with the observed 4-factor structure.

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See detailAddictions (Section: Nouveautés en Médecine 2018)
Daeppen, Jean-Bernard; Billieux, Joël; Achab, Sophia; Etter, Jean-Francois; Bertholet, Nicolas; Deligianni, Marianthi; Penzenstadler, Louise; Khazaal, Yasser; Simon, Olivier

in Revue medicale suisse (2019), 15(N° 632-633), 14-16

New drugs available in a click, plethora of games, new regulations on cannabis, addiction medicine has a lot to do ! In 2018, Switzerland recognized a training certificate in addiction medicine, pathological gambling entered into ICD-11 and vaping, first considered with suspicion, found a place in the pharmacopoeia of the fight against tobacco. That's not all, on the alcohol front, we realized that even a small glass can hurt and the medicine of addictions evolved towards models of recovery that aim to improve quality of life with chronic diseases. Finally, the American opioid prescription epidemic is worrying in Switzerland, even if the situation and the context are very different.

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See detailEpidemiological Challenges in the Study of Behavioral Addictions: a Call for High Standard Methodologies
Rumpf, Hans-Jürgen; Brandt, Dominique; Demetrovics, Zsolt; Billieux, Joël; Carragher, Natacha; Brand, Matthias; Bowden-Jones, Henrietta; Rahimi-Movaghar, Afarin; Assanangkornchai, Sawitri; Glavak-Tkalic, Renata; Borges, Guilherme; Lee, Hae-Kook; Rehbein, Florian; Fineberg, Naomi A.; Mann, Karl; Potenza, Marc N.; Stein, Dan J.; Higuchi, Susumu; King, Daniel; Saunders, John B.; Poznyak, Vladimir

in Current Addiction Reports (2019), 6(3), 331-337

Purpose of Review The 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) categorizes gambling disorder in the section on substance-related and addictive disorders, and the 11th revision of the International Classification of Diseases (ICD-11) includes both gambling and gaming disorder as disorders due to addictive behaviors. However, there is less evidence for other putative behavioral addictions. This review focuses on requirements for epidemiological studies of disorders that may be considered as behavioral addictions and compares the current state of research with principles of sound epidemiological research. Recent Findings In studies of behavioral addictions, samples are often quite small, which may lead to increased random error. The lack of sound assessment tools—particularly the lack of agreed-upon diagnostic criteria and standardized diagnostic interviews—may also increase systematic error. Other concerns related to systematic bias include the use of convenience samples, lack of pro-active recruitment, inadequate assessment of confounding variables, and a dearth of representative and longitudinal studies. Summary This review recommends that future studies of putative behavioral addictions should more closely adhere to methodological standards of epidemiological research to reduce random and systematic error. Specific recommendations are detailed to advance epidemiological research in this area with the aim of improving the evidence base and generating more refined public health recommendations and policies.

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See detailTen-Item Internet Gaming Disorder Test (IGDT-10): Measurement invariance and cross-cultural validation across seven language-based samples
Király, Orsolya; Bothe, Beáta; Ramos-Diaz, Jano; Rahimi-Movaghar, Afarin; Lukavska, Katerina; Hrabec, Ondrej; Miovsky, Michal; Billieux, Joël; Deleuze, Jory; Nuyens, Filip; Karila, Laurent; Griffiths, Mark D.; Nagygyörgy, Katalin; Urbán, Róbert; Potenza, Marc N.; King, Daniel L.; Rumpf, Hans-Jürgen; Carragher, Natacha; Demetrovics, Zsolt

in Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors (2019), 33(1), 91-103

The Ten-Item Internet Gaming Disorder Test (IGDT-10) is a short screening instrument developed to assess Internet gaming disorder (IGD) as proposed in the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM–5), adopting a concise, clear, and consistent item-wording. According to initial studies conducted in 2014, the instrument showed promising psychometric characteristics. The present study tested the psychometric properties, including language and gender invariance, in a large international sample of online gamers. In this study, data were collected from 7,193 participants comprising Hungarian (n = 3,924), Iranian (n = 791), English-speaking (n = 754), French-speaking (n = 421), Norwegian (n = 195), Czech (n = 496), and Peruvian (n = 612) online gamers via gaming-related websites and gaming-related social-networking-site groups. A unidimensional factor structure provided a good fit to the data in all language-based samples. In addition, results indicated both language and gender invariance on the level of scalar invariance. Criterion and construct validity of the IGDT-10 was supported by its strong association with the Problematic Online Gaming Questionnaire and moderate association with weekly gaming time, psychopathological symptoms, and impulsivity. The proportions of each sample that met the cut-off score on the IGDT-10 varied between 1.61% and 4.48% in the individual samples, except for the Peruvian sample (13.44%). The IGDT-10 shows robust psychometric properties and appears suitable for conducting cross-cultural and gender comparisons across seven languages.

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See detailCross-Cultural Validation of the Compulsive Internet Use Scale in Four Forms and Eight Languages
Lopez-Fernandez, Olatz; Griffiths, Mark D.; Kuss, Daria J.; Dawes, Christopher; Pontes, Halley M.; Justice, Lucy; Rumpf, Hans-Jürgen; Bischof, Anja; Gässler, Ann-Kathrin; Suryani, Eva; Männikkö, Niko; Kääriänen, Maria; Romo, Lucia; Morvan, Yannick; Kern, Laurence; Graziani, Pierluigi; Rousseau, Amélie; Hormes, Julia M.; Schimmenti, Adriano; Passanisi, Alessia; Demetrovics, Zsolt; Király, Orsolya; Lelonek-Kuleta, Bernadeta; Chwaszcz, Joanna; Dufour, Magali; Ponce Terashima, Javier; Chóliz, Mariano; Zacarés, Juan José; Serra, Emilia; Rochat, Lucien; Zullino, Daniele; Achab, Sophia; Landrø, Nils Inge; Billieux, Joël

in Cyberpsychology, Behavior, and Social Networking (2019), 22(7), 451-464

Abstract The 14-item Compulsive Internet Use Scale (CIUS) is one of the most frequently internationally adapted psychometric instruments developed to assess generalized problematic Internet use. Multiple adaptations of this instrument have led to versions in different languages (e.g., Arabic and French), and different numbers of items (e.g., from 5 to 16 items instead of the original 14). However, to date, the CIUS has never been simultaneously compared and validated in several languages and different versions. Consequently, the present study tested the psychometric properties of four CIUS versions (i.e., CIUS-14, CIUS-9, CIUS-7, and CIUS-5) across eight languages (i.e., German, French, English, Finnish, Spanish, Italian, Polish, and Hungarian) to (a) examine their psychometric properties, and (b) test their measurement invariance. These analyses also identified the optimal versions of the CIUS. The data were collected via online surveys administered to 4,226 voluntary participants from 15 countries, aged at least 18 years, and recruited from academic environments. All brief versions of the CIUS in all eight languages were validated. Dimensional, configural, and metric invariance were established across all languages for the CIUS-5, CIUS-7, and CIUS-9, but the CIUS-5 and CIUS-7 were slightly more suitable because their model fitted the ordinal estimate better, while for cross-comparisons, the CIUS-9 was slightly better. The brief versions of the CIUS are therefore reliable and structurally stable instruments that can be used for cross-cultural research across adult populations.

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See detailA transdiagnostic dimensional approach towards a neuropsychological assessment for addiction: an international Delphi consensus study.
Yucel, Murat; Oldenhof, Erin; Ahmed, Serge; Belin, David; Billieux, Joël; Bowden-Jones, Henrietta; Carter, Adrian; Chamberlain, Samuel R.; Clark, Luke; Connor, Jason; Daglish, Mark; Dom, Geert; Dannon, Pinhas; Duka, Theodora; Fernandez-Serrano, Maria Jose; Field, Matt; Franken, Ingmar; Goldstein, Rita Z.; Gonzalez, Raul; Goudriaan, Anneke; Grant, Jon E.; Gullo, Matthew J.; Hester, Rob; Hodgins, David; Le Foll, Bernard; Lee, Rico S. C.; Lingford-Hughes, Anne; Lorenzetti, Valentina; Moeller, Scott J.; Munafo, Marcus R.; Odlaug, Brian; Potenza, Marc N.; Segrave, Rebecca; Sjoerds, Zsuzsika; Solowij, Nadia; van den Brink, Wim; Van Holst, Ruth J.; Voon, Valerie; Wiers, Reinout; Fontenelle, Leonardo F.; Verdejo-Garcia, Antonio

in Addiction (2019), 114(6), 1095-1109

BACKGROUND: The U.S. National Institutes of Mental Health Research Domain Criteria (RDoC) seek to stimulate research into biologically validated neuropsychological dimensions across mental illness symptoms and diagnoses. The RDoC framework comprises 39 functional constructs designed to be revised and refined, with the overall goal to improve diagnostic validity and treatments. This study aimed to reach a consensus among experts in the addiction field on the 'primary' RDoC constructs most relevant to substance and behavioural addictions. METHODS: Forty-four addiction experts were recruited from Australia, Asia, Europe and the Americas. The Delphi technique was used to determine a consensus as to the degree of importance of each construct in understanding the essential dimensions underpinning addictive behaviours. Expert opinions were canvassed online over three rounds (97% completion rate), with each consecutive round offering feedback for experts to review their opinions. RESULTS: Seven constructs were endorsed by >/=80% of experts as 'primary' to the understanding of addictive behaviour: five from the Positive Valence System (Reward Valuation, Expectancy, Action Selection, Reward Learning, Habit); one from the Cognitive Control System (Response Selection/Inhibition); and one expert-initiated construct (Compulsivity). These constructs were rated to be differentially related to stages of the addiction cycle, with some more closely linked to addiction onset, and others more to chronicity. Experts agreed that these neuropsychological dimensions apply across a range of addictions. CONCLUSIONS: The study offers a novel and neuropsychologically informed theoretical framework, as well as a cogent step forward to test transdiagnostic concepts in addiction research, with direct implications for assessment, diagnosis, staging of disorder, and treatment.

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See detailDie Erweiterung von Konzepten und Definitionen von Suchtverhalten
Billieux, Joël; Vögele, Claus

in Verhaltenstherapie (2018), 28(4), 209-211

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See detailPrecise estimates of gaming-related harm should guide regulation of gaming
Starcevic, Vladan; Billieux, Joël

in Journal of Behavioral Addictions (2018), 7(3), 522-525

Regulation of gaming is largely based on the perception of gaming-related harm. This perception varies from one country to another and does not necessarily correspond to the real gaming-related harm. It is argued that there is a crucial need to define and assess domains of this harm in order to introduce policies that regulate gaming. Such policies would ideally be targeted at individuals at risk for problematic gaming and would be based more on educational efforts than on restrictive measures. The role of gaming industry in the regulation of gaming would depend on the more precise estimates of gaming-related harm.

See detailLe jeu pathologique: un trouble des processus impliqués dans la prise de décision?
Brevers, Damien; Billieux, Joël

in Strowel, Alain; Philippe, Denis; Schamps, Geneviève (Eds.) Droit des jeux de hasard (2018)

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See detailSelfitis and behavioural addiction: A plea for terminological and conceptual rigour.
Starcevic, Vladan; Billieux, Joël; Schimmenti, Adriano

in The Australian and New Zealand journal of psychiatry (2018), 52(10), 919-920

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See detailSelfitis, selfie addiction, Twitteritis: Irresistible appeal of medical terminology for problematic behaviours in the digital age
Starcevic, Vladan; Billieux, Joël; Schimmenti, Adriano

in Australian & New Zealand Journal of Psychiatry (2018), 52(5), 408-409

Behaviours that are performed compulsively and repetitively and are associated with certain negative consequences have been a conceptual challenge for psychopathology. They are usually labelled as behavioural addictions, although this term has been vague, misused and applied to an exceptionally wide variety of activities (Starcevic, 2016). A similar trend to medicalise problematic behaviours has appeared more recently, with an emergence of ‘selfitis’ (Balakrishnan and Griffiths, in press). This article draws attention to these troublesome tendencies and aims to shed more light on their origin and implications.

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See detailEfficacy of metacognitive therapy in improving mental health: A meta-analysis of single-case studies
Rochat, Lucien; Manolov, Rumen; Billieux, Joël

in Journal of Clinical Psychology (2018), 74(6), 896-915

Context. Metacognitive therapy and one of its treatment components, the attention training technique are increasingly being delivered to improve mental health. Objective. To examine the efficacy of metacognitive therapy and/or attention training technique on mental health outcomes from single-case studies. Methods. Fourteen studies (53 patients) were included. The d-statistic for multiple baseline data and the percentage change index were used to compute the effect sizes. Results. Metacognitive therapy has a large effect on depression, anxiety, other psychopathological symptoms, and all outcomes together. Effect sizes were significantly moderated by the number of sessions, the severity and duration of symptoms, and patient gender, but not by study quality or attention training technique when used as a stand-alone treatment. At the follow-up, 77.36% of the individuals were considered recovered or had maintained improvement. Conclusion. Metacognitive therapy and attention training technique strongly contribute to improving mental health outcomes. This study effectively informs evidence-based practice in the clinical milieu.

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See detailEmotionally laden impulsivity interacts with affect in predicting addictive use of online sexual activity in men
Wéry, Aline; Deleuze, Jory; Canale, Natale; Billieux, Joël

in Comprehensive Psychiatry (2018), 80

The interest in studying addictive use of online sexual activities (OSA) has grown sharply over the last decade. Despite the burgeoning number of studies conceptualizing the excessive use of OSA as an addictive disorder, few have tested its relations to impulsivity, which is known to constitute a hallmark of addictive behaviors. To address this missing gap in the literature, we tested the relationships between addictive OSA use, impulsivity traits, and affect among a convenience sample of men (N = 182; age, M = 29.17), building upon a theoretically driven model that distinguishes the various facets of impulsivity. Results showed that negative urgency (an impulsivity trait reflecting the tendency to act rashly in negative emotional states) and negative affect interact in predicting addictive OSA use. These results highlight the pivotal role played by negative urgency and negative affect in addictive OSA use, supporting the relevance of psychological interventions that focus on improving emotional regulation (e.g., to reduce negative affect and learn healthier coping strategies) to mitigate excessive use of OSA.

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See detailInduced sadness increases persistence in a simulated slot machine task among recreational gamblers
Devos, Gaëtan; Clark, Luke; Maurage, Pierre; Billieux, Joël

in Psychology of Addictive Behaviors : Journal of the Society of Psychologists in Addictive Behaviors (2018), 32(3), 383-388

Gambling may constitute a strategy for coping with depressive mood, but a direct influence of depressive mood on gambling behaviors has never been tested via realistic experimental designs in gamblers. The current study tested whether experimentally induced sadness increases persistence on a simulated slot machine task using real monetary reinforcement in recreational gamblers. Sixty participants were randomly assigned to an experimental (sadness induction) or control (no emotional induction) condition, and then performed a slot machine task consisting of a mandatory phase followed by a persistence phase. Potential confounding variables (problem gambling symptoms, impulsivity traits, gambling cognitions) were measured to ensure that the experimental and control groups were comparable. The study showed that participants in the sadness condition displayed greater gambling persistence than control participants (p = .011). These data support the causal role of negative affect in decisions to gamble and persistence, which bears important theoretical and clinical implications

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See detailSubtyping attenuated psychotic symptoms: A cluster analytic approach
Laloyaux, Julien; Larøi, Frank; Nuyens, Filip; Billieux, Joël

in Journal of Clinical Psychology (2018), 74(12), 2117-2133

Objective The aim of the present study is to examine the heterogeneity of attenuated psychotic symptoms (PS) and related personality factors using a cluster analytic approach. Method A large sample of participants from the general population was evaluated in terms of attenuated symptomatology (psychotic and affective) and two personality factors: encoding style and impulsivity traits. Results Cluster analysis emphasized the existence of five independent clusters: High Psychosis, High Positive, High Negative, High Impulsive-Low Psychosis, and Low Psychosis. Cluster comparisons demonstrated that the personality factors and PS are differentially involved in the clusters. Conclusions The present study demonstrated that reliable and relatively distinct clusters of individuals from the general population can be identified based on established PS and related personality factors. The fact that a variety of profiles was observed contributes to a better understanding of the nature of the heterogeneity characterizing PS and has clear theoretical and clinical implications.

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See detailBinge-watching engagement as determined by motivations, impulsivity and emotional reactivity: A cluster analytic approach.
Flayelle, Maèva; Maurage, Pierre; Vögele, Claus; Karila, Laurent; Billieux, Joël

in Alcoholism, Clinical and Experimental Research (2018), 42 (Suppl. 2)

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See detailPassion or addiction ? Correlates of healthy versus problematic use of videogames in a sample of French-speaking regular gamers
Deleuze, Jory; Long, Jiang; Liu, Tie-Qiao; Maurage, Pierre; Billieux, Joël

in Addictive Behaviors (2018), 82

A criticism of current diagnostic approaches to gaming disorder is that they fail to take into account that high and repeated engagement is not problematic per se, nor is it necessarily associated with adverse consequences. To tackle this controversy, we used confirmatory factor analysis to test, in regular gamers (N = 268), whether high (but healthy) engagement can be distinguished from problematic engagement by using the Addiction-Engagement Questionnaire (Charlton & Danforth, 2007). We then tested whether differential relationships exist between the engagement and addiction constructs, DSM-5 criteria for Internet gaming disorder (IGD), and psychological factors linked to gaming use and misuse (self-reported impulsivity, motives to play, and depression). Results indicated that a model holding engagement and addiction as two distinct, but related, constructs fits the data well. Second, we showed that although both constructs are linked to the number of IGD criteria endorsed, the relationship is more pronounced for the addiction construct. Third, a differential pattern of correlations was observed with the other study variables, further supporting the need to distinguish the two constructs. Our study emphasizes that research is needed to refine the diagnostic approach to gaming disorder to avoid conflating healthy passion with pathological behavior.

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See detailProblematic smartphone use: Investigating contemporary experiences using a convergent design
Kuss, Daria J.; Harkin, Lydia; Kanjo, Eiman; Billieux, Joël

in International Journal of Environmental Research and Public Health (2018), 15

Internet-enabled smartphones are increasingly ubiquitous in the Western world. Research suggests a number of problems can result from mobile phone overuse, including dependence, dangerous and prohibited use. For over a decade, this has been measured by the Problematic Mobile Phone Use Questionnaire (PMPU-Q). Given the rapid developments in mobile technologies, changes of use patterns and possible problematic and addictive use, the aim of the present study was to investigate and validate an updated contemporary version of the PMPU-Q (PMPU-Q-R). A mixed methods convergent design was employed, including a psychometric survey (N = 512) alongside qualitative focus groups (N = 21), to elicit experiences and perceptions of problematic smartphone use. The results suggest the PMPU-Q-R factor structure can be updated to include smartphone dependence, dangerous driving, and antisocial smartphone use factors. Theories of problematic mobile phone use require consideration of the ubiquity and indispensability of smartphones in the present day and age, particularly regarding use whilst driving and in social interactions

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See detailA multifactorial and integrative approach to impulsivity in neuropsychology: Insights from the UPPS model of impulsivity
Rochat, Lucien; Billieux, Joël; Gagnon, Jean; Van der Linden, Martial

in Journal of Clinical and Experimental Neuropsychology (2018), 40(1), 45-61

Risky and excessive behaviors, such as aggressive and compulsive behaviors, are frequently described in patients with brain damage and have dramatic psychosocial consequences. Although there is strong evidence that impulsivity constitutes a key factor at play in these behaviors, the literature about impulsivity in neuropsychology is to date scarce. In addition, examining and understanding these problematic behaviors requires the assumption that impulsivity is a multidimensional construct. Consequently, this article aims at shedding light on frequent risky and excessive behaviors in patients with brain damage by focusing on a unified, comprehensive, and well-validated model, namely, the UPPS model of impulsivity (Whiteside & Lynam, 2001). This model considers impulsivity as a multidimensional construct that includes four facets: urgency, (lack of) premeditation, (lack of) perseverance, and sensation seeking. Furthermore, we discuss the psychological mechanisms underlying the dimensions of impulsivity, as well as the laboratory tasks designed to assess each mechanism and their neural bases. We then present a scale specifically designed to assess these four dimensions of impulsivity in patients with brain damage and examine the data regarding this multidimensional approach to impulsivity in neuropsychology. This review supports the need to adopt a multifactorial and integrative approach toward impulsive behaviors, and the model presented provides a valuable rationale to disentangle the nature of brain systems and mechanisms underlying impulsive behaviors in patients with brain damage. It may also foster further relevant research in the field of impulsivity and improve assessment and rehabilitation of impulsive behaviors in clinical settings.

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See detailInterference with Processing Negative Stimuli in Problematic Internet Users: Preliminary Evidence from an Emotional Stroop Task.
Schimmenti, Adriano; Starcevic, Vladan; Gervasi, Alessia M.; Deleuze, Jory; Billieux, Joël

in Journal of clinical medicine (2018), 7(7), 177

Although it has been proposed that problematic Internet use (PIU) may represent a dysfunctional coping strategy in response to negative emotional states, there is a lack of experimental studies that directly test how individuals with PIU process emotional stimuli. In this study, we used an emotional Stroop task to examine the implicit bias toward positive and negative words in a sample of 100 individuals (54 females) who also completed questionnaires assessing PIU and current affect states. A significant interaction was observed between PIU and emotional Stroop effects (ESEs), with participants who displayed prominent PIU symptoms showing higher ESEs for negative words compared to other participants. No significant differences were found on the ESEs for positive words among participants. These findings suggest that PIU may be linked to a specific emotional interference with processing negative stimuli, thus supporting the view that PIU is a dysfunctional strategy to cope with negative affect. A potential treatment implication for individuals with PIU includes a need to enhance the capacity to process and regulate negative feelings.

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See detailExecutive Impairments in Binge Drinking: Evidence for a Specific Performance-Monitoring Difficulty during Alcohol-Related Processing.
Lannoy, Severine; Maurage, Pierre; D'Hondt, Fabien; Billieux, Joël; Dormal, Valerie

in European addiction research (2018), 24(3), 118-127

This study evaluated inhibition and performance-monitoring abilities through the explicit processing of alcohol cues. Twenty-two binge drinkers (BD) and 22 control participants performed a speeded Go/No-Go task using pictures of alcohol and soft cans as Go and No-Go targets. This task measures inhibitory control and performance monitoring (i.e., task adjustment through errors and feedback processing) during the explicit processing of alcohol cues. Groups did not significantly differ regarding inhibition abilities. However, BD had poorer performance-monitoring abilities, reflected by a difficulty to adjust after errors, especially when these errors were related to alcohol cues. These findings suggest that the explicit processing of alcohol cues negatively impacts cognitive abilities among BD.

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See detailAssessing binge-watching behaviors: Development of the « Watching TV Series Motives » and the « Binge-Watching Engagement » questionnaires
Flayelle, Maèva; Canale, Natale; Maurage, Pierre; Vögele, Claus; Karila, Laurent; Billieux, Joël

in Journal of Behavioral Addictions (2018), 7 (Suppl.1)

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See detailDoes “forced abstinence” from gaming lead to pornography use? Insight from the April 2018 crash of Fortnite’s servers
Castro-Calvo, Jesús; Ballester-Arnal, Rafael; Potenza, Marc; King, Daniel Luke; Billieux, Joël

in Journal of Behavioral Addictions (2018), 7(3), 501-502

In April 2018, the servers of the popular video game “Fortnite” crashed for 24 hr. During this period, Pornhub (a popular pornographic website) analyzed trends in pornography access, finding that: (a) the percentage of gamers accessing Pornhub increased by 10% and (b) the searches of pornographic videos using the key term “Fortnite” increased by 60%. In this letter, we discuss these observations in the context of ongoing debate regarding the validity of “withdrawal” when applied to problematic involvement in video gaming and the potential use of pornography as a “compensation behavior” during the periods of “forced abstinence” from gaming.

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See detailGender differences in gambling preferences and problem gambling: a network-level analysis
Baggio, Stéphanie; Gainsbury, Sally M; Starcevic, Vladan; Richard, Jean-Baptiste; Beck, François; Billieux, Joël

in International Gambling Studies (2018), 18(3), 512-525

Most gambling studies have a gender-blind research approach, although a large body of scientific evidence suggests that gambling in females is on the rise and that males and females have different gambling behaviours and experience specific gambling-related harm. This study addressed these gender differences using a network analysis, an innovative approach considering disorders/concepts as dynamic systems of interacting symptoms/items. Data on gambling activities, problem gambling, substance use and mental health were collected in a representative sample of French adult gamblers (n = 8805). The study capitalized on the network analysis directly to compare associations of specific gambling activities with gambling disorder symptoms separately for both genders. The network analysis revealed that problem gambling was strongly associated with gambling machines among females, whereas it was related to sports betting, poker and casino games among males. The networks that included substance use and mental health showed that substance use was related to specific gambling activities. These findings confirm the links between various gender specific gambling patterns and problem gambling and suggest a need to consider these gender differences to improve prevention efforts. More broadly, the present study further supports the importance of gender differences for gambling research and policy.

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See detailSpanish validation of the Sexual Addiction Screening Test.
Castro-Calvo, Jesus; Ballester-Arnal, Rafael; Billieux, Joël; Gil-Julia, Beatriz; Gil-Llario, Maria Dolores

in Journal of behavioral addictions (2018), 7(3), 584-600

BACKGROUND AND AIMS: Sexual addiction is a pathological behavior characterized by a combination of excessive sexual desire and impaired ability to control it. Its incidence ranges between 1.2% and 32.2%, although this number may vary depending on the screening tool used. This wide variability is largely due to the use of non-validated instruments (e.g., structural validity relying on exploratory analyses, instruments translated without an additional validation process, or instruments validated in another format). To deal with these limitations, this study tested the psychometric properties of the Spanish paper-and-pencil and online versions of the Sexual Addiction Screening Test (SAST). METHODS: A total of 2,528 participants (1,163 males) completed the Spanish version of the SAST, along with other instruments assessing sexual compulsivity (1,585 = paper-and-pencil, 943 = online). RESULTS: The exploratory factor analysis yielded a four-factor structure explaining 57.39% of the variance for the SAST paper-and-pencil version. This factor structure was then verified for the online version through the use of confirmatory factor analysis [chi(2)(264) = 441.59; chi(2)/df = 1.66; RMSEA = 0.02; CFI = 0.94; IFI = 0.94]. This methodology was also used to support measurement invariance (configural, metric, and scalar invariance) according to gender. The reliability of the total score ranged from .82 to .85. Similarly, correlations with related scales were positive and significant (r between .22 and .71). Temporal stability 1 year after the first application was 0.65 (paper-and-pencil format) and 0.60 (online version). CONCLUSION: These results, together with the absence of questionnaires translated into Spanish to assess this construct, justify the use of the SAST in the evaluation of sexual addiction in Spanish-speaking countries.

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See detailAffective impairments in binge drinking: Investigation through emotional facial expression decoding
Lannoy, Séverine; Dormal, Valérie; Brion, Mélanie; Gaudelus, Baptiste; Billieux, Joël; Maurage, Pierre

in Comprehensive Psychiatry (2018), 83

Objective: Binge drinking, an excessive alcohol consumption pattern frequently observed in young people, is known to be associated with psychological and cerebral deficits. While cognitive dysfunctions have been widely investigated, emotional abilities have scarcely been explored. Such an exploration would however offer a more exhaustive understanding of the deficits associated with binge drinking, as well as of the possible transition towards alcohol-dependence. Methods: 46 young adults (23 binge drinkers, 12 women; 23 control participants, 12 women) were recruited among university students. They performed an emotional recognition task consisting of the visual decoding of six basic emotions (i.e. anger, contempt, disgust, fear, happiness, and sadness). Accuracy scores and detection thresholds were collected for each emotion. Results: Binge drinkers showed lower performance than control participants for the decoding of all emotions and increased detection thresholds, this later reflecting less ability to capture an emotion. Binge drinking is thus associated with a need for higher emotional intensity to perform correct detection. Moreover, these emotional difficulties appear specifically related to alcohol consumption. Conclusion: These findings reinforce previous experimental evidence of altered emotional processing among binge drinkers, and extend these results for various emotional contents. They support the hypothesis of a continuum between binge drinking and alcohol-dependence, in which massive emotional impairments have been documented. Indeed, these impairments could be involved in the onset and maintenance of excessive alcohol consumption, notably through the established relationship between emotional deficits and social distress.

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See detailAutomatic social comparison: Cognitive load facilitates an increase in negative thought accessibility after thin ideal exposure among women
Bocage-Barthélémy, Yvana; Chatard, Armand; Jaafari, Nematollah; Tello, Nina; Billieux, Joël; Daveau, Emmanuel; Selimbegović, Leila

in PLoS ONE (2018), 13(3), 0193200

Women are routinely exposed to images of extremely slim female bodies (the thin ideal) in advertisements, even if they do not necessarily pay much attention to these images. We hypothesized that paradoxically, it is precisely in such conditions of low attention that the impact of the social comparison with the thin ideal might be the most pronounced. To test this prediction, one hundred and seventy-three young female participants were exposed to images of the thin ideal or of women’s fashion accessories. They were allocated to either a condition of high (memorizing 10 digits) or low cognitive load (memorizing 4 digits). The main dependent measure was implicit: mean recognition latency of negative words, relative to neutral words, as assessed by a lexical decision task. The results showed that thin-ideal exposure did not affect negative word accessibility under low cognitive load but that it increased it under high cognitive load. These findings are consistent with the hypothesis that social comparison with the thin ideal is an automatic process, and contribute to explain why some strategies to prevent negative effects of thin-ideal exposure are inefficient.

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See detailPrevalence and Correlates of Problematic Online Gaming: a Systematic Review of the Evidence Published in Chinese
Long, Jiang; Liu, Tieqiao; Liu, Yueheng; Hao, Wei; Maurage, Pierre; Billieux, Joël

in Current Addiction Reports (2018), 5(3), 359-371

Purpose of Review With the ongoing debate about whether problematic online gaming (POG) constitutes a genuine mental disorder, it is important for all available evidence in the field to be accessible. In this systematic review, we summarize the numerous results related to POG published in Chinese in order to make them more accessible to the international community. Recent Findings We identified 36 relevant studies published in Chinese (7 epidemiological, 21 related to psychological factors, and 8 related to neurocognitive exploration, involving 362,328 participants in total). According to the literature, the prevalence rates of POG in China range from 3.5 to 17%, which is higher than those reported worldwide. Overall, the data published in Chinese are consistent with the international literature. Some distinctive findings emerged, however, in particular in relation to familial, scholastic, and social factors; cognitive impairments; and functional changes in neural circuits. Summary This review is the first to render available articles on POG in Chinese for the international community, which could contribute to the current debate on the status of POG as a genuine mental health condition. Crucially, findings from the Chinese literature often resulted from studies conducted on large random or clinical samples. This is important because a repeated criticism about the recognition of POG as a genuine disorder is the fact that the evidence-based results rely heavily on convenience samples of nonclinical participants.

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See detailExploring gambling craving through the elaborated intrusion theory of desire: a mixed methods approach
Cornil, Aurélien; Lopez-Fernandez, Olatz; Devos, Gaëtan; de Timary, Philippe; Goudriaan, Anna E.; Billieux, Joël

in International Gambling Studies (2018), 18(1), 1-21

Gambling disorder is a well-established behavioural addiction, which was classified with substance-related disorders in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders. Although craving was introduced as a new diagnostic criterion for substance-related disorders, it was not included for gambling disorder. This study aimed to explore the experience of gambling craving and to evaluate whether the elaborated intrusion theory of desire (EIT), a cognitive model of craving, fits gambling craving. A mixed methods study was conducted among 31 non-clinical gamblers. The qualitative part consisted of open-ended questions targeting the components of the EIT. The quantitative part consisted of a questionnaire designed to assess triggers and descriptions of gambling craving. Qualitative analysis revealed six distinct conceptual categories related to gambling craving: positive and negative affect, external cues, mental imageries, thoughts and physiological sensations. The quantitative analysis highlighted the most relevant triggers (e.g. spontaneous thoughts) and experiential characteristics (e.g. visual imagery) of gambling craving. The present study allowed the authors to support the relevance of the EIT as it applies to gambling craving by disentangling its core features. Findings from this study suggest that the use of interventions derived from the EIT may be relevant for problem gambling treatment.

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See detailElectrophysiological correlates of emotional crossmodal processing in binge drinking.
Lannoy, Severine; D'Hondt, Fabien; Dormal, Valerie; Blanco, Marine; Brion, Melanie; Billieux, Joël; Campanella, Salvatore; Maurage, Pierre

in Cognitive, Affective and Behavioral Neuroscience (2018), 18(6), 1076-1088

Emotional crossmodal integration (i.e., multisensorial decoding of emotions) is a crucial process that ensures adaptive social behaviors and responses to the environment. Recent evidence suggests that in binge drinking-an excessive alcohol consumption pattern associated with psychological and cerebral deficits-crossmodal integration is preserved at the behavioral level. Although some studies have suggested brain modifications during affective processing in binge drinking, nothing is known about the cerebral correlates of crossmodal integration. In the current study, we asked 53 university students (17 binge drinkers, 17 moderate drinkers, 19 nondrinkers) to perform an emotional crossmodal task while their behavioral and neurophysiological responses were recorded. Participants had to identify happiness and anger in three conditions (unimodal, crossmodal congruent, crossmodal incongruent) and two modalities (face and/or voice). Binge drinkers did not significantly differ from moderate drinkers and nondrinkers at the behavioral level. However, widespread cerebral modifications were found at perceptual (N100) and mainly at decisional (P3b) stages in binge drinkers, indexed by slower brain processing and stronger activity. These cerebral modifications were mostly related to anger processing and crossmodal integration. This study highlights higher electrophysiological activity in the absence of behavioral deficits, which could index a potential compensation process in binge drinkers. In line with results found in severe alcohol-use disorders, these electrophysiological findings show modified anger processing, which might have a deleterious impact on social functioning. Moreover, this study suggests impaired crossmodal integration at early stages of alcohol-related disorders.

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See detailInternet gaming disorder should qualify as a mental disorder
King, Daniel L; Delfabbro, Paul H; Potenza, Marc N; Demetrovics, Zsolt; Billieux, Joël; Brand, Matthias

in Australian & New Zealand Journal of Psychiatry (2018), 52(7), 615617

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See detailTechnology-mediated addictive behaviors constitute a spectrum of related yet distinct conditions: A network perspective
Baggio, Stéphanie; Starcevic, Vladan; Studer, Joseph; Simon, Olivier; Gainsbury, Sally M.; Gmel, Gerhard; Billieux, Joël

in Psychology of Addictive Behaviors : Journal of the Society of Psychologists in Addictive Behaviors (2018), 32(5), 564-572

An important ongoing debate in the addiction field is whether certain technologymediated behaviors constitute tenable and independent constructs. This study investigated whether problematic technology-mediated behaviors could be conceptualized as a spectrum of related, yet distinct disorders (spectrum hypothesis), using the network approach that considers disorders as networks of symptoms. We used data from the Cohort Study on Substance Use and Risk Factors (C-SURF), with a representative sample of young Swiss men (subsample of participants engaged in technology-mediated behaviors, n=3,404). Four technology-mediated addictive behaviors were investigated using symptoms derived from the DSM-5 and the component model of addiction: Internet, smartphone, gaming, and cybersex. Network analyses included network estimation and visualization, community detection tests, and centrality indices. The network analysis identified four distinct clusters corresponding to each condition, but only Internet addiction had numerous relationships with the other behaviors. This finding, along with the finding that there were few relationships between the other behaviors, suggests that smartphone addiction, gaming addiction, and cybersex addiction are relatively independent constructs. Internet addiction was often connected with other conditions through the same symptoms, suggesting that it could be conceptualized as an “umbrella construct,” i.e., a common vector that mediates specific online behaviors. The network analysis thus provides a preliminary support to the spectrum hypothesis and the focus on the specific activities performed online, while showing that the construct of “Internet addiction” is inadequate.

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See detailGame Addiction Scale Assessment Through a Nationally Representative Sample of Young Adult Men: Item Response Theory Graded–Response Modeling
Khazaal, Yasser; Breivik, Kyrre; Billieux, Joël; Zullino, Daniele; Thorens, Gabriel; Achab, Sophia; Gmel, Gerhard; Chatton, Anne

in Journal of Medical Internet Research (2018), 20(8), 10058

Background: The 7-item Game Addiction Scale (GAS) has been validated under standard confirmatory factor analysis and exhibits good psychometric properties. Whether this scale satisfies the necessary conditions for consideration by item response theory (IRT) modeling remains unknown. However, the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) recently proposed criteria, in its section 3, to define internet gaming disorder (IGD) to promote research on this possible condition. Objective: The objective of our study was to (1) analyze GAS in the context of IRT (graded-response) modeling; (2) investigate differential item functioning (DIF), a feature of IRT modeling, in 2 subsamples; and (3) contribute to the ongoing (IGD) debate related to the validity of the DSM-5 criteria using GAS items as a proxy. Methods: We assessed 2 large representative samples of Swiss men (3320 French-speaking and 2670 German-speaking) with GAS. Results: All items comprised high discrimination parameters. GAS items such as relapse, conflict, withdrawal, and problems (loss of interests) were endorsed more frequently in more severe IGD stages, whereas items related to tolerance, salience (preoccupation), and mood modification (escape) were endorsed more widely among participants (including in less severe IGD stages). Several DIF effects were found but were classified as negligible. Conclusions: The results of the analyses partly support the relevance of using IRT to further establish the psychometric properties of the GAS items. This study contributes to testing the validity of the IGD criteria, although cautious generalization of our findings is required with GAS being only a proxy of the IGD criteria.

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See detailDisentangling the role of users' preferences and impulsivity traits in problematic Facebook use.
Rothen, Stephane; Briefer, Jean-Francois; Deleuze, Jory; Karila, Laurent; Andreassen, Cecilie Schou; Achab, Sophia; Thorens, Gabriel; Khazaal, Yasser; Zullino, Daniele; Billieux, Joël

in PloS one (2018), 13(9), 0201971

The use of social network sites (SNSs) has grown dramatically. Numerous studies have shown that SNS users may suffer from excessive use, associated with addictive-like symptoms. With a focus on the popular SNS Facebook (FB), our aims in the current study were twofold: First, to explore the heterogeneity of FB usage and determine which kind of FB activity predicts problematic usage; second, to test whether specific impulsivity facets predict problematic use of FB. To this end, a sample of FB users (N = 676) completed an online survey assessing usage preferences (e.g., types of activities performed), symptoms of problematic FB use and impulsivity traits. Results indicated that specific usage preferences (updating one's status, gaming via FB, and using notifications) and impulsive traits (positive and negative urgency, lack of perseverance) are associated to problematic FB use. This study underscores that labels such as FB "addiction" are misleading and that focusing on the actual activities performed on SNSs is crucial when considering dysfunctional usage. Furthermore, this study clarified the role of impulsivity in problematic FB use by building on a theoretically driven model of impulsivity that assumes its multidimensional nature. The current findings have identifiable theoretical and public health implications.

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See detailBalancing validity, utility and public health considerations in disorders due to addictive behaviours.
Stein, Dan J.; Billieux, Joël; Bowden-Jones, Henrietta; Grant, Jon E.; Fineberg, Naomi; Higuchi, Susumu; Hao, Wei; Mann, Karl; Matsunaga, Hisato; Potenza, Marc N.; Rumpf, Hans-Jurgen M.; Veale, David; Ray, Rajat; Saunders, John B.; Reed, Geoffrey M.; Poznyak, Vladimir

in World psychiatry : official journal of the World Psychiatric Association (WPA) (2018), 17(3), 363-364

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See detailManifesto for a European research network into Problematic Usage of the Internet
Fineberg, Naomi A.; Demetrovics, Zsolt; Stein, Dan J.; Loannidis, Konstantinos; Potenza, Marc N.; Grünblatt, Edna; Brand, Matthias; Billieux, Joël; Carmi, Lior; King, Daniel Luke; Grant, Jon E.; Yücel, Murat; Dell'Osso, Bernardo; Rumpf, Hans-Jürgen; Hall, Natalie; Hollander, Eric; Goudriaan, Anna; Menchon, Jose M; Zohar, Joseph; Burkauskas, Julius; Martinotti, Giovanni; Van Ameringen, Michael; Corazza, Ornella; Pallanti, Stefano; COST ACTION NETWORK; Chamberlain, Samuel Robin

in European Neuropsychopharmacology (2018), 28(11), 1232-1246

The Internet is now all-pervasive across much of the globe. While it has positive uses (e.g. prompt access to information, rapid news dissemination), many individuals develop Problematic Use of the Internet (PUI), an umbrella term incorporating a range of repetitive impairing behaviours. The Internet can act as a conduit for, and may contribute to, functionally impairing behaviours including excessive and compulsive video gaming, compulsive sexual behaviour, buying, gambling, streaming or social networks use. There is growing public and National health authority concern about the health and societal costs of PUI across the lifespan. Gaming Disorder is being considered for inclusion as a mental disorder in diagnostic classification systems, and was listed in the ICD-11 version released for consideration by Member States ( http://www.who.int/classifications/icd/revision/timeline/en/ ). More research is needed into disorder definitions, validation of clinical tools, prevalence, clinical parameters, brain-based biology, socio-health-economic impact, and empirically validated intervention and policy ap- proaches. Potential cultural differences in the magnitudes and natures of types and patterns of PUI need to be better understood, to inform optimal health policy and service development. To this end, the EU under Horizon 2020 has launched a new four-year European Cooperation in Science and Technology (COST) Action Programme (CA 16207), bringing together scientists and clinicians from across the fields of impulsive, compulsive, and addictive disorders, to advance networked interdisciplinary research into PUI across Europe and beyond, ultimately seeking to inform regulatory policies and clinical practice. This paper describes nine critical and achievable research priorities identified by the Network, needed in order to advance understanding of PUI, with a view towards identifying vulnerable individuals for early intervention. The network shall enable collaborative research networks, shared multinational databases, multicentre studies and joint publications .

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See detailMeasurement Invariance of the Short Version of the Problematic Mobile Phone Use Questionnaire (PMPUQ-SV) across Eight Languages
Lopez-Fernandez, Olatz; Kuss, Daria J.; Pontes, Halley M.; Griffiths, Mark D.; Dawes, Christopher; Justice, Lucy V.; Männikkö, Niko; Kääriäinen, Maria; Rumpf, Hans-Jürgen; Bischof, Anja; Gässler, Ann-Kathrin; Romo, Lucia; Kern, Laurence; Morvan, Yannick; Rousseau, Amélie; Graziani, Pierluigi; Demetrovics, Zsolt; Király, Orsolya; Schimmenti, Adriano; Passanisi, Alessia; Lelonek-Kuleta, Bernadeta; Chwaszcz, Joanna; Chóliz, Mariano; Zacarés, Juan José; Serra, Emilia; Dufour, Magali; Rochat, Lucien; Zullino, Daniele; Achab, Sophia; Landrø, Nils Inge; Suryani, Eva; Hormes, Julia M.; Terashima, Javier Ponce; Billieux, Joël

in International Journal of Environmental Research and Public Health (2018), 15(6), 1213

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See detailIncluding gaming disorder in the ICD-11: The need to do so from a clinical and public health perspective.
Rumpf, Hans-Jurgen; Achab, Sophia; Billieux, Joël; Bowden-Jones, Henrietta; Carragher, Natacha; Demetrovics, Zsolt; Higuchi, Susumu; King, Daniel L.; Mann, Karl; Potenza, Marc; Saunders, John B.; Abbott, Max; Ambekar, Atul; Aricak, Osman Tolga; Assanangkornchai, Sawitri; Bahar, Norharlina; Borges, Guilherme; Brand, Matthias; Chan, Elda Mei-Lo; Chung, Thomas; Derevensky, Jeff; Kashef, Ahmad El; Farrell, Michael; Fineberg, Naomi A.; Gandin, Claudia; Gentile, Douglas A.; Griffiths, Mark D.; Goudriaan, Anna E.; Grall-Bronnec, Marie; Hao, Wei; Hodgins, David C.; Ip, Patrick; Kiraly, Orsolya; Lee, Hae Kook; Kuss, Daria; Lemmens, Jeroen S.; Long, Jiang; Lopez-Fernandez, Olatz; Mihara, Satoko; Petry, Nancy M.; Pontes, Halley M.; Rahimi-Movaghar, Afarin; Rehbein, Florian; Rehm, Jurgen; Scafato, Emanuele; Sharma, Manoi; Spritzer, Daniel; Stein, Dan J.; Tam, Philip; Weinstein, Aviv; Wittchen, Hans-Ulrich; Wolfling, Klaus; Zullino, Daniele; Poznyak, Vladimir

in Journal of behavioral addictions (2018), 7(3), 556-561

The proposed introduction of gaming disorder (GD) in the 11th revision of the International Classification of Diseases (ICD-11) developed by the World Health Organization (WHO) has led to a lively debate over the past year. Besides the broad support for the decision in the academic press, a recent publication by van Rooij et al. (2018) repeated the criticism raised against the inclusion of GD in ICD-11 by Aarseth et al. (2017). We argue that this group of researchers fails to recognize the clinical and public health considerations, which support the WHO perspective. It is important to recognize a range of biases that may influence this debate; in particular, the gaming industry may wish to diminish its responsibility by claiming that GD is not a public health problem, a position which maybe supported by arguments from scholars based in media psychology, computer games research, communication science, and related disciplines. However, just as with any other disease or disorder in the ICD-11, the decision whether or not to include GD is based on clinical evidence and public health needs. Therefore, we reiterate our conclusion that including GD reflects the essence of the ICD and will facilitate treatment and prevention for those who need it.

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See detailDevelopment of questionnaires measuring the engagement and the motives related to TV series watching
Flayelle, Maèva; Maurage, Pierre; Billieux, Joël; Karila, Laurent

Poster (2017, June)

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Billieux, Joël

in Zeigler-Hill, Virgil; Shackelford, Todd K. (Eds.) Encyclopedia of Personality and Individual Differences (2017)

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See detailProblematic cybersex: Conceptualization, assessment, and treatment.
Wery, A.; Billieux, Joël

in Addictive Behaviors (2017), 64

Problematic involvement in cybersex is generally considered to be an excessive and uncontrolled use of online sexual activities associated with tangible negative outcomes and functional impairment. To date, there is no consensus in the literature regarding the conceptualization and labeling of this disorder, or of its diagnosis and assessment (e.g., screening questionnaires and diagnostic criteria). Through a systematic examination of the literature, we emphasize that problematic cybersex is an umbrella construct that regroups various types of distinct dysfunctional online behaviors. Despite a considerable increase in studies on problematic cybersex, no clear diagnostic guidelines exist for clinicians and researchers. Moreover, the factors involved in the development and maintenance of the disorder remain poorly examined, and the evidence regarding valid assessment and treatment are lacking.

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See detailDoes the construct of Internet addiction reflect a single entity or a spectrum of disorders?
Starcevic, Vladan; Billieux, Joël

in Clinical Neuropsychiatry (2017), 14(1), 5-10

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See detailL’impact des nouvelles technologies sur le développement
Danet, Marie; Billieux, Joël

in Miljkovitch, Raphaele; Morange-Majoux, Françoise; Emmanuel, Sander (Eds.) Traité de psychologie du développement (2017)

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See detailToward a Qualitative Understanding of Binge-Watching Behaviors: A Focus Group Approach
Flayelle, Maèva; Maurage, Pierre; Billieux, Joël

in Journal of Behavioral Addictions (2017), 6(4), 457-471

Background and aims: Binge-watching (i.e., seeing multiple episodes of the same TV series in a row) now constitutes a widespread phenomenon. However, little is known about the psychological factors underlying this behavior, as reflected by the paucity of available studies, most merely focusing on its potential harmfulness by applying the classic criteria used for other addictive disorders without exploring the uniqueness of binge-watching. The present study thus aimed to take the opposite approach as a first step toward a genuine understanding of binge-watching behaviors through a qualitative analysis of the phenomenological characteristics of TV series watching. Methods: A focus group of regular TV series viewers (N=7) was established to explore a wide range of aspects related to TV series watching (e.g., motives, viewing practices, related behaviors). Results: A content analysis identified bingewatching features across three dimensions: TV series watching motivations, TV series watching engagement, and structural characteristics of TV shows. Most participants acknowledged that TV series watching can become addictive, but they all agreed having trouble recognizing themselves as truly being an “addict.” Although obvious connections could be established with substance addiction criteria and symptoms, such parallelism appeared to be insufficient, as several distinctive facets emerged (e.g., positive view, transient overinvolvement, context dependency, low everyday life impact). Discussion and conclusions: Research should go beyond the classic biomedical and psychological models of addictive behaviors to account for binge-watching in order to explore its specificities and generate first steps toward an adequate theoretical rationale for these emerging problematic behaviors.

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See detailTechnological addictions: Conceptualisation, measurement, etiology and treatment.
Kuss, Daria J.; Billieux, Joël

in Addictive behaviors (2017), 64

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See detailAlcohol-cue exposure decreases response inhibition towards alcohol-related stimuli in detoxified alcohol-dependent patients.
Kreusch, Fanny; Billieux, Joël; Quertemont, Etienne

in Psychiatry research (2017), 249

The induction of alcohol craving and the cognitive processing of alcohol-related stimuli in alcohol-dependent patients have been reported to compete with inhibitory control and contribute to alcohol relapse. The aim of the present study is to investigate whether the induction of a craving state, using an alcohol cue exposure paradigm, influences response inhibition towards both neutral stimuli and alcohol-related stimuli in alcohol-dependent patients. Thirty-one detoxified alcohol-dependent patients were exposed to either their preferred alcoholic beverage or to a glass of water. They then performed a modified stop signal task, which used alcohol-related words, neutral words and non-words, and a lexical decision as the Go response. The alcohol-cue exposure group reported significantly higher alcohol craving and showed higher percentages of commission errors towards alcohol-related words than the control group. All participants, but especially those of the alcohol-cue exposure group, showed also shorter reaction times when alcohol words were used as targets in go trials. The induction of alcohol craving in detoxified alcohol-dependent patients increases the motivational salience value of alcohol stimuli, leading them to automatically approach alcohol-related cues and therefore impairing response inhibition towards those stimuli.

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See detailBinging at the campus: motivations and impulsivity influence binge drinking profiles in university students
Lannoy, Séverine; Billieux, Joël; Poncin, Marie; Maurage, Pierre

in Psychiatry Research (2017), 250

This study explored the involvement of two key psychological factors, drinking motives and impulsivity traits, in binge drinking. On the basis of a large screening phase (N=4424), 867 binge drinkers were selected and were first compared with 924 non-binge drinkers. Then, a cluster analysis was performed, focusing on the binge drinker sample, to explore the respective involvement of four drinking motives (DMQ-R model) and four impulsivity facets (UPPS model) in this habit. Centrally, the cluster analysis identified three clusters of binge drinkers presenting distinct psychological characteristics and alcohol consumption patterns: emotional, recreational, and hazardous binge drinkers. Hazardous binge drinkers were characterized by strong drinking motives but moderate impulsivity. Binge drinking should thus no more be considered as a unitary drinking pattern but rather as a habit encompassing a variety of psychological profiles. Moreover, risky drinking habits in young people might be mainly related to disproportionate drinking motives. Future studies should thus consider binge drinking heterogeneity, and prevention programs focusing on drinking motivations should be developed.

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See detailShoot at First Sight! First Person Shooter Players Display Reduced Reaction Time and Compromised Inhibitory Control in Comparison to Other Video Game Players
Deleuze, Jory; Christiaens, Maxime; Nuyens, Filip; Billieux, Joël

in Computers in Human Behavior (2017), 72

Studies have shown that regular video games use might improve cognitive and social skills. In contrast, other studies have documented the negative outcomes of excessive gaming vis-à-vis health and socioprofessional spheres. Both positive and negative outcomes of video game use were linked to their structural characteristics (i.e., features that make the game appealing or are inducements for all gamers to keep playing regularly). The current study tested whether active video gamers from main genres (massively multiplayer online role-playing games, online first person shooter, multiplayer online battle arena) differed in a laboratory task that measured inhibitory control. Eighty-one gamers performed the Hybrid-Stop Task, assessing restraint (go/no-go trials) and cancellation (stop-signal trials) processes of a prepotent response. They completed additional self-reported questionnaires measuring demographics, problematic video game use, impulsivity traits, and depressive symptoms. Results showed that when confounding variables were controlled for, participants whose favorite game is online first person shooter were characterized by accelerated motor responses yet reduced abilities to cancel a prepotent response. No differences between groups were identified regarding the restraint process. The findings of this pilot study might have clear implications for video gaming research by supporting the critical importance of distinguishing between video game genres when considering their specific potential benefits and detrimental effects

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See detailThe benefits of using the UPPS model of impulsivity rather than the Big Five when assessing the relationship between personality and problem gambling.
Canale, Natale; Vieno, Alessio; Bowden-Jones, Henrietta; Billieux, Joël

in Addiction (2017), 112(2), 372-373

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See detailSchizotypal personality traits and problematic use of massively-multiplayer online role-playing games (MMORPGs)
Schimmenti, Adriano; Infanti, Alexandre; Badoud, Déborah; Laloyaux, Julien; Billieux, Joël

in Computers in Human Behavior (2017), 74

A link between maladaptive personality traits and an excessive use of massively multiplayer online role-playing games (MMORPGs) has been documented. However, the role of schizotypal personality traits in MMORPG use is understudied. The aim of this study was to explore the potential links between schizotypal traits, motivations for playing MMORPGs, and symptoms of problematic MMORPG use. Eighty-three MMORPG gamers were enrolled in the study. They filled out questionnaires measuring schizotypal personality traits and an adapted version of the same scale designed to measure in-game schizotypal traits. All participants also filled out questionnaires assessing motivations for gaming and disordered use of MMORPGs. Results of the study showed that the disorganized and interpersonal traits of schizotypy decreased when participants were thinking about themselves in the virtual world. Schizotypal traits, together with achievement and immersion motives, predicted problematic use of MMORPGs. The findings of this study may suggest that schizotypal traits and motivations for playing can interact and play a relevant role in the onset and maintenance of problematic gaming

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See detailProblematic Gaming Behaviour in Finnish Adolescents and Young Adults: Relation to Game Genres, Gaming Motives and Self-Awareness of Problematic Use
Männikkö, N.; Billieux, Joël; Nordström, T.; Koivisto, K.; Kääriäinen, M.

in International Journal of Mental Health and Addiction (2017), 15

The aim of this study was to explore the relation between Problematic Gaming Behaviour (PGB) and specific psychological factors (gaming motives, self-awareness of problematic gaming behaviour) and structural factors (game genres) among Finnish adolescents and young adults. A national survey of 271 respondents, aged 13 to 24, participated in the study. The study sample was randomly selected from the Population Register Center. Multiple regression analysis was used as a means of examining links between game genres, gaming motives and PGB. In addition, pairwise comparisons of a non-problematic gaming behavior group and a problematic gaming behavior group were used as a means of examining differences across game genre use and self-awareness of PGB. PGB was particularly associated with the use of a group of games encompassing role-playing, progression (e.g., character development), action and strategy features. The findings indicated that entertainment-achievement, social and escapism motives were associated with PGB. On the whole, this study emphasized that specific game genres and playing motives are involved in problematic use of digital game playing. © 2016 Springer Science+Business Media New York

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See detailPreserved crossmodal integration of emotional signals in binge drinking
Lannoy, Séverine; Dormal, Valérie; Brion, Mélanie; Billieux, Joël; Maurage, Pierre

in Frontiers in Psychology (2017), 8

Binge drinking is an alcohol consumption pattern with various psychological and cognitive consequences. As binge drinking showed qualitatively comparable cognitive impairments to those reported in alcohol-dependence, a continuum hypothesis suggests that this habit would be a first step toward alcohol-related disorders. Besides these cognitive impairments, alcohol-dependence is also characterized by large-scale deficits in emotional processing, particularly in crossmodal contexts, and these abilities have scarcely been explored in binge drinking. Emotional decoding, most often based on multiple modalities (e.g., facial expression, prosody or gesture), yet represents a crucial ability for efficient interpersonal communication and social integration. The present study is the first exploration of crossmodal emotional processing in binge drinking, in order to test whether binge drinkers already present the emotional impairments described among alcohol-dependent patients, in line with the continuum hypothesis. Twenty binge drinkers and 20 matched controls performed an experimental task requiring the identification of two emotions (happiness or anger) presented in two modalities (visual or auditory) within three conditions (unimodal, crossmodal congruent or crossmodal incongruent). In accordance with previous research in binge drinking and alcohol-dependence, this study was based on two main hypotheses. First, binge drinkers would present a reduced facilitation effect (i.e., classically indexed in healthy populations by faster reaction times when two congruent modalities are presented simultaneously). Second, binge drinkers would have higher difficulties to inhibit interference in incongruent modalities. Results showed no significant difference between groups in emotional decoding ability, whatever the modality or condition. Control participants, however, appeared slower than binge drinkers in recognizing facial expressions, also leading to a stronger facilitation effect when the two modalities were presented simultaneously. However, findings did not show a disrupted facilitation effect in binge drinkers, whom also presented preserved performance to inhibit incongruence during emotional decoding. The current results thus suggest that binge drinkers do not demonstrate a deficit for emotional processing, both in unimodal and crossmodal contexts. These results imply that binge drinking might not be characterized by impairments for the identification of primary emotions, which could also indicate that these emotional processing abilities are well-preserved at early stages of excessive alcohol consumption

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See detailImpulsivity influences betting under stress in laboratory gambling
Canale, Natale; Rubaltelli, Enrico; Vieno, Alessio; Pittarello, Andrea; Billieux, Joël

in Scientific Reports (2017), 7

Although recent research suggests that acute stress influences subsequent decision-making under ambiguity, less is known about the role of personality variables in this relationship. This study tested whether impulsivity traits and acute stress differentially influence the way in which a prior feedback is incorporated into further decisions involving ambiguity. Sixty college students (50% male; aged 18–25 years) were randomly assigned to a stress versus a non-stress condition before completing a laboratory gambling task. The results revealed that independently of the stress condition, subjects behaved as if the odds of winning increase after a single loss. Additionally, stress effects varied as a function of impulsivity traits. Individuals who lacked perseverance (i.e., had difficulty focusing on a difficult or boring task) gambled more after experiencing a loss in the stress condition than did those in the control condition. The present study supports that impulsivity traits can explain the differential effect of stress on the relationship between prior feedback and choices made under ambiguity

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See detailElectrophysiological correlates of performance monitoring in binge drinking: impaired error-related but preserved feedback processing
Lannoy, Severine; D'Hondt, Fabien; Dormal, Valérie; Billieux, Joël; Maurage, Pierre

in Clinical Neurophysiology (2017), 128

Objective: Performance monitoring, which allows efficient behavioral regulation using either internal (error processing) or external (feedback processing) cues, has not yet been explored in binge drinking despite its adaptive importance in everyday life, particularly in the regulation of alcohol consumption. Capitalizing on a theoretical model of risky behaviors, the present study aimed at determining the behavioral and electrophysiological correlates of the cognitive (inhibition) and motivational (reward sensitivity) systems during performance monitoring. Methods: Event-related potentials were recorded from 20 binge drinkers and 20 nonbinge drinkers during two experimental tasks, a speeded Go/No-Go Task [investigating internal error processing by Error-Related Negativity (ERN) and error positivity (Pe)] and a Balloon Analogue Risk Task [investigating external feedback processing by Feedback-Related Negativity (FRN) and P3]. Results: While no group differences were observed at the behavioral level, electrophysiological results showed that binge drinkers, despite having intact feedback-related components, presented modified error-monitoring components (i.e. larger ERN amplitude, delayed Pe latency). Conclusions: Internal performance monitoring is impaired in binge drinkers, showing an abnormal automatic processing of response errors (ERN) and a decreased processing of their motivational significance (Pe). Significance: These results suggest that the electrophysiological correlates of inhibitory control allow identifying the specific binge drinking consumption pattern.

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See detailInternet Gaming Disorder as a formative construct: Implications for conceptualization and measurement.
van Rooij, Antonius J.; Van Looy, Jan; Billieux, Joël

in Psychiatry and clinical neurosciences (2017), 71(7), 445-458

Some people have serious problems controlling their Internet and video game use. The DSM-5 now includes a proposal for 'Internet Gaming Disorder' (IGD) as a condition in need of further study. Various studies aim to validate the proposed diagnostic criteria for IGD and multiple new scales have been introduced that cover the suggested criteria. Using a structured approach, we demonstrate that IGD might be better interpreted as a formative construct, as opposed to the current practice of conceptualizing it as a reflective construct. Incorrectly approaching a formative construct as a reflective one causes serious problems in scale development, including: (i) incorrect reliance on item-to-total scale correlation to exclude items and incorrectly relying on indices of inter-item reliability that do not fit the measurement model (e.g., Cronbach's alpha); (ii) incorrect interpretation of composite or mean scores that assume all items are equal in contributing value to a sum score; and (iii) biased estimation of model parameters in statistical models. We show that these issues are impacting current validation efforts through two recent examples. A reinterpretation of IGD as a formative construct has broad consequences for current validation efforts and provides opportunities to reanalyze existing data. We discuss three broad implications for current research: (i) composite latent constructs should be defined and used in models; (ii) item exclusion and selection should not rely on item-to-total scale correlations; and (iii) existing definitions of IGD should be enriched further.

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See detailDo executive functions predict binge-drinking patterns? Evidence from a longitudinal study in young adulthood
Bø, Ragnhild; Billieux, Joël; Gjerde, Line C.; Eilertsen, Espen M.; Landrø, Nils I.

in Frontiers in Psychology (2017), 8

Background: Impairments in executive functions (EFs) are related to binge drinking in young adulthood, but research on how EFs influence future binge drinking is lacking. The aim of the current report is therefore to investigate the association between various EFs and later severity of, and change in, binge drinking over a prolonged period during young adulthood. Methods: At baseline, 121 students reported on their alcohol habits (the Alcohol use disorder identification test; Alcohol use questionnaire). Concurrently, EFs (working memory, reversal, set-shifting, response inhibition, response monitoring and decision-making (with ambiguity and implicit risk)) were assessed. Eighteen months later, information on alcohol habits for 103 of the participants were gathered. Data were analyzed by means of multilevel regression modeling. Results: Future severity of binge drinking was uniquely predicted by performance on the Information sampling task, assessing risky decision-making (β = -1.86, 95% CI: -3.69, -0.04). None of the study variables predicted severity or change in binge drinking. Conclusion: Future severity of binge was associated with making risky decisions in the prospect for gain, suggesting reward hypersensitivity. Future studies should aim at clarifying whether there is a causal association between decision-making style and binge drinking. Performance on all executive tasks was unrelated to change in binge drinking patterns; however, the finding was limited by overall small changes, and needs to be confirmed with longer follow-up periods.

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See detailCorrelates of social exclusion in social anxiety Disorder: An fMRI study
Heeren, Alexandre; Dricot, Laurence; Billieux, Joël; Philippot, Pierre; Grynberg, Delphine; De Timary, Philippe; Maurage, Pierre

in Scientific Reports (2017), 7

Cognitive models posit that social anxiety disorder (SAD) is maintained by biased informationprocessing vis-à-vis threat of social exclusion. However, uncertainty still abounds regarding the very nature of this sensitivity to social exclusion in SAD. Especially, brain alterations related to social exclusion have not been explored in SAD. Our primary purpose was thus to determine both the selfreport and neural correlates of social exclusion in this population. 23 patients with SAD and 23 matched nonanxious controls played a virtual game (“Cyberball”) during fMRI recording. Participants were frst included by other players, then excluded, and fnally re-included. At the behavioral level, patients with SAD exhibited signifcantly higher levels of social exclusion feelings than nonanxious controls. At the brain level, patients with SAD exhibited signifcantly higher activation within the left inferior frontal gyrus relative to nonanxious controls during the re-inclusion phase. Moreover, self-report of social exclusion correlates with the activity of this cluster among individuals qualifying for SAD diagnosis. Our pattern of fndings lends strong support to the notion that SAD may be better portrayed by a poor ability to recover following social exclusion than during social exclusion per se. These fndings value social neuroscience as an innovative procedure to gain new insight into the underlying mechanisms of SAD.

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See detailAdaptation and validation of the Gambling Motives Questionnaire-Financial (GMQ-F) in a sample of French-speaking gamblers
Devos, G.; Challet-Bouju, G.; Burnay, J.; Maurage, P.; Grall-Bronnec, M.; Billieux, Joël

in International Gambling Studies (2017), 17(1), 87-101

Previous research has identified specific gambling motives and linked them with both healthy and disordered gambling. The Gambling Motives Questionnaire (GMQ) is currently the most widely used measure for these motives. The present study aimed to offer a French validation of the latest version of this scale, the GMQ-Financial (GMQ-F), which measures four distinct motives (enhancement, social, coping, financial). The French GMQ-F was completed by 278 gamblers from the community and 22 treatment-seeking pathological gamblers, along with scales assessing gambling cognitions, impulsivity, disordered gambling symptoms and psychopathological symptoms. Confirmatory factor analysis supported the expected four-factor model. The GMQ-F subscales have good internal reliability. Validity of the GMQ-F is supported by specific correlations with the other constructs measured. Pathological gamblers differed from gamblers from the community on all but one (social) of the GMQ-F subscales. The French GMQ-F presents good psychometric properties and constitutes a reliable instrument for measuring gambling motives in research and clinical practice. © 2016 Informa UK Limited, trading as Taylor & Francis Group

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See detailImpulsivity traits and gambling cognitions associated with gambling preferences and clinical status
Navas, J. F.; Billieux, Joël; Perandrés-Gómez, A.; López-Torrecillas, F.; Cándido, A.; Perales, J. C.

in International Gambling Studies (2017), 17(1), 102-124

Impulsivity (and related traits reward/punishment sensitivity and tolerance to delayed rewards) and gambling cognitions have been linked to gambling. However, their independent associations with gambling preferences and clinical status have never been dissociated. The current study applied a data-driven strategy to identify gambling preferences, based on gambling frequency in several modalities. The two resulting factors were used to classify gambling disorder patients (GDPs) and non-problem recreational gamblers (RGs) into Type I (preferring cards, casino games and skill-based bets) and Type II (preferring slot machines, lotteries/pools and bingo). Participants were assessed in impulsivity, delay discounting, reward/punishment sensitivity, gambling-related cognitions, gambling severity, gambling frequency and average amount gambled per episode. GDPs scored higher than RGs in positive and negative urgency, delay discounting, reward sensitivity and intensity of gambling-related cognitions, but less in lack of perseverance. Additionally, Type II gamblers had greater difficulties delaying gratification, whereas Type I gamblers showed higher cognitive distortion and reward sensitivity levels. In practical terms, the finding that some characteristics are equally pervasive in disordered gamblers independently of their preferences (affect-driven impulsivity), whereas others (distorted cognitions, reward sensitivity, delay discounting) are more prominent in one type or the other, provides a basis to establish targets’ priority in therapy. © 2017 Informa UK Limited, trading as Taylor & Francis Group

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See detailDifferential impairments across attentional networks in binge drinking.
Lannoy, Severine; Heeren, Alexandre; Moyaerts, Nathalie; Bruneau, Nicolas; Evrard, Salome; Billieux, Joël; Maurage, Pierre

in Psychopharmacology (2017), 234

RATIONALE: The cognitive deficits observed in young binge drinkers have been largely documented during the last decade. Yet, these earlier studies have mainly focused on high-level cognitive abilities (particularly memory and executive functions), and uncertainty thus still abounds regarding the integrity of less complex cognitive processes in binge drinking. This is particularly true for attentional abilities, which play a crucial role in behavior regulation and are impaired in other alcohol-related disorders. OBJECTIVES AND METHODS: To specify the attentional deficits associated with binge drinking, two groups of university students (40 binge drinkers and 40 matched controls) performed the Attention Network Task, a theoretically grounded test assessing three independent attentional networks: alerting, orienting, and executive control. RESULTS: Binge drinkers displayed preserved orienting performance but impaired alerting and executive control. Binge drinking is thus not related to a general attentional impairment but rather to specific impairments of the alerting and executive control networks. CONCLUSIONS: These results underline that, beyond the already explored high-level deficits, binge drinking is also related to impairments for attentional abilities. In view of the role played by attentional impairments in alcohol dependence, the present data also suggest that rehabilitation programs should be developed to improve attentional abilities at the early stages of alcohol-related disorders.

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See detailEstablished risk factors for addiction failto discriminate between healthy gamers and gamers endorsing DSM-5 Internet gaming disorder
Deleuze, Jory; Nuyens, Filip; Rochat, Lucien; Rothen, Stéphane; Maurage, Pierre; Billieux, Joël

in Journal of Behavioral Addictions (2017), 6(4), 516-524

Background and aims: The DSM-5 includes criteria for diagnosing Internet gaming disorder (IGD) that are adapted from substance abuse and widely used in research and clinical contexts, although evidence supporting their validity remains scarce. The present study compared online gamers who do or do not endorse IGD criteria regarding self-control-related abilities (impulsivity, inhibitory control, and decision making), considered the hallmarks of addictive behaviors. Method: A double approach was adopted to distinguish pathological from recreational gamers in a sample of gamers: The first is the classic DSM-5 approach (≥5 criteria required to endorse the IGD diagnosis), and the second consists in using latent class analysis (LCA) for IGD criteria to distinguish gamers’ subgroups. We computed comparisons separately for each approach. Ninety-seven volunteer gamers from the community were recruited. Self-reported questionnaires were used to measure demographic and game-related characteristics, problematic online gaming (with the Problematic Online Gaming Questionnaire), impulsivity (with the UPPS-P Impulsive Behavior Scale), and depression (with the Beck Depression Inventory-II). Experimental tasks were used to measure inhibitory control (Hybrid-Stop Task) and decision-making abilities (Game of Dice Task). Results: Thirty-two participants met IGD criteria (33% of the sample), whereas LCA identified two groups of gamers (pathological [35%] and recreational). Comparisons that used both approaches (DSM-5 and LCA) failed to identify significant differences regarding all constructs except for variables related to actual or problematic gaming behaviors. Discussion: The validity of IGD criteria is questioned, mostly with respect to their relevance in distinguishing high engagement from pathological involvement in video games.

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See detailIs medicine use for nervousness associated with adolescent at-risk or problem gambling ?
Canale, Natale; Vieno, Alessio; Billieux, Joël; Lazzeri, Giacomo; Lemma, Patrizia; Santinello, Massimo

in European Addiction Research (2017), 23(4), 171-176

Objective: To examine the association between adolescent at-risk or problem gambling (ARPG) and medicine used to treat nervousness in a large-scale nationally representative sample of Italian adolescents. Study design: Data from the 2013 to 2014 Health Behaviour in School-aged Children Survey was used for cross-sectional analyses (a sample of 20,791 15-year-old students). Self-administered questionnaires were completed by a representative sample of high-school students. Respondents’ ARPG, use of medicine for nervousness and potential confounding factors were assessed. Multilevel logistic regression analyses were used to test the association between medicine use to treat nervousness and ARPG. Results: The overall prevalence of adolescents reporting medicine use for nervousness in the last month was 6.3%. The odds of ARPG were 3 times higher among adolescents who used medicine for nervousness compared to that among adolescents who did not take such medicine (OR 2.96, 95% CI 2.07–4.25). Importantly, the association between medicine used to treat nervousness and ARPG did not vary significantly when viewed in light of psychological symptoms. Conclusions: Medicine use to treat nervousness is associated with increased risk of gambling-related harm.

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See detailImpact of transcranial direct current stimulation on attentional bias for threat: a proof-of-concept study among individuals with social anxiety disorder.
Heeren, Alexandre; Billieux, Joël; Philippot, Pierre; De Raedt, Rudi; Baeken, Chris; de Timary, Philippe; Maurage, Pierre; Vanderhasselt, Marie-Anne

in Social cognitive and affective neuroscience (2017), 21

Cognitive models posit that social anxiety disorder (SAD) is associated with and maintained by attentional bias (AB) for social threat. However, over the last years, it has been suggested that AB in SAD may result from a decreased activation of the left prefrontal cortex, and particularly of its dorsolateral part (dlPFC). Accordingly, a transient increase of neural activity within the left dlPFC via non-invasive brain stimulation decreases AB in non-anxious control participants. Yet, none of these studies focused on SAD. This is especially unfortunate as SAD constitutes the main target for which a genuine reduction of AB may be most appropriate. In this experiment, we sought to investigate the causal influence of left dlPFC neuromodulation on AB among 19 female individuals with a DSM-5 diagnosis of SAD. We adopted a double-blind within-subject protocol in which we delivered a single-session of anodal versus sham transcranial Direct Current Stimulation (tDCS) over the left dlPFC during the completion of a probe discrimination task assessing AB. Consistent with our hypothesis, participants demonstrated a significant decrease in AB during the anodal tDCS over the left DLPFC relative to the sham stimulation. These findings value tDCS as an innovative procedure to gain new insight into the underlying mechanisms of SAD.

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See detailTraumatic experiences, alexithymia, and Internet addiction symptoms among late adolescents: A moderated mediation analysis.
Schimmenti, Adriano; Passanisi, Alessia; Caretti, Vincenzo; La Marca, Luana; Granieri, Antonella; Iacolino, Calogero; Gervasi, Alessia M.; Maganuco, Noemi R.; Billieux, Joël

in Addictive behaviors (2017), 64

The association between traumatic experiences, alexithymia, and substance abuse is well established. Less is known about the role of traumatic experiences and alexithymia in the onset and maintenance of Internet-related disorders. In the present study, self-report measures on traumatic experiences, alexithymia, and problematic Internet use were administered to 358 high school students (57% females) aged 18-19years old, to test whether alexithymic traits mediated the relationship between traumatic experiences and Internet addiction symptoms, and whether gender moderated the proposed mediation in the sample. While partial mediation occurred in the entire sample, gender directly affected the relationship between the investigated constructs: Internet addiction symptoms were independently related to traumatic experiences among males, and to alexithymic traits among females. Therefore, the results of this study suggest that trauma memories among males, and problems with affect regulation among females, may increase the risk of problematic Internet use during late adolescence. Such findings might have relevant implications to inform any treatment plan for late adolescent students who are overinvolved with online activities, pointing out that tailored approaches to their problems and difficulties are particularly needed in clinical practice.

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See detailAttentional Impairments in Huntington’s Disease: A Specific Deficit for the Executive Conflict
Maurage, Pierre; Heeren, Alexandre; Lahaye, Magali; Jeanjean, Anne; Guettat, Lamia; Verellen-Dumoulin, Christine; Halkin, Stéphane; Billieux, Joël; Constant, Eric

in Neuropsychology (2017), 31(4), 424-436

Objective: Huntington’s disease (HD) is characterized by motor and cognitive impairments including memory, executive, and attentional functions. However, because earlier studies relied on multidetermined attentional tasks, uncertainty still abounds regarding the differential deficit across attentional subcomponents. Likewise, the evolution of these deficits during the successive stages of HD remains unclear. The present study simultaneously explored 3 distinct networks of attention (alerting, orienting, executive conflict) in preclinical and clinical HD. Method: Thirty-eight HD patients (18 preclinical) and 38 matched healthy controls completed the attention network test, an integrated and theoretically grounded task assessing the integrity of 3 attentional networks. Results: Preclinical HD was not characterized by any attentional deficit compared to controls. Conversely, clinical HD was associated with a differential deficit across the 3 attentional networks under investigation, showing preserved performance for alerting and orienting networks but massive and specific impairment for the executive conflict network. This indexes an impaired use of executive control to resolve the conflict between task-relevant stimuli and interfering task-irrelevant ones. Conclusion: Clinical HD does not lead to a global attentional deficit but rather to a specific impairment for the executive control of attention. Moreover, the absence of attentional deficits in preclinical HD suggests that these deficits are absent at the initial stages of the disease. In view of their impact on everyday life, attentional deficits should be considered in clinical contexts. Therapeutic programs improving the executive control of attention by neuropsychology and neuromodulation should be promoted.

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See detailBehavioural Addiction Open Definition 2.0 – Using the open science framework for collaborative and transparent theoretical development
Billieux, Joël; Van Rooij, Antonius J; Heeren, Alexandre; Schimmenti, Adriano; Maurage, Pierre; Edman, Johan; Blaszczynski, Alexander; Khazaal, Yasser; Kardefelt-Winther, Daniel

in Addiction (2017), 112(10), 1723-1724

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See detailProblematic smartphone use and its relation with anxiety and depression: a survey in a large sample of undergraduates
Liu, Yueheng; Long, Jiang; Billieux, Joël; Qi, Chang; He, Haoyu; Chen, Shubao; Wu, Qiuxia; Xiong, Yifan; Liu, Tieqiao

in Chinese Journal of Psychiatry (2017), 50(4), 270-275

[Objective] To investigate the differences of socio-demographics and smartphone use features among Chinese college students between problematic smartphone user (PSU) and non-PSU, and to clarify the link between PSU and psychopathological symptoms (anxiety and depression). [Methods] A total of 1 205 undergraduates from 35 classes of 8 universities or colleges, stratified with different school levels, were selected using the cluster random sampling strategy. The Problematic Cellular Phone Use Questionnaire (PCPUQ) was used to identify problematic use of smartphone use, and Zung Self-Rating Anxiety Scale (SAS) and Zung Self-Rating Depression Scale (SDS) were used to measure anxiety and depression symptoms. [Results] The prevalence of PSU among undergraduates was estimated to be 20.6% (207/1 006). There were significant differences between PSU and non-PSU on their major of either science category or humanities category (χ2=11.424 ,P<0.01), grade (χ2=5.868 ,P<0.05), monthly living expense supported by their family (χ2=12.713 ,P<0.01), daily time spent on their smartphones (χ2=20.052, P<0.01), frequency of changing the mobile phones (χ2=14.511 ,P<0.01) and monthly smartphone bill (χ2=13.107, P< 0.01). Furthermore, the self rated anxiety (34.8% (72/207) vs. 14.6% (117/799),χ2=43.704, P<0.01) and depression (36.2%(75/207) vs. 15.4%(123/799), χ2=45.159,P<0.01) were both found more elevated in PSU than non-PSU. [Conclusion] Some common sociodemographic variables and smartphone usage patterns were identified in undergraduates displaying PSU. Moreover, PSU is associated with more elevated anxiety and depression symptoms. Problematic smartphone use and its relation with anxiety and depression: a survey in a large sample of undergraduates (Article in Chinese). Available from: https://www.researchgate.net/publication/318762637_Problematic_smartphone_use_and_its_relation_with_anxiety_and_depression_a_survey_in_a_large_sample_of_undergraduates_Article_in_Chinese [accessed Aug 2, 2017].

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See detailHow can we conceptualize behavioural addiction without pathologizing common behaviours?
Kardefelt-Winther, Daniel; Heeren, Alexandre; Schimmenti, Adriano; van Rooij, Antonius; Maurage, Pierre; Carras, Michèle; Edman, Johan; Blaszczynski, Alexander; Khazaal, Yasser; Billieux, Joël

in Addiction (2017), 112(10), 1709-1715

Following the recent changes to the diagnostic category for addictive disorders in DSM-5, it is urgent to clarify what constitutes behavioural addiction to have a clear direction for future research and classification. However, in the years following the release of DSM-5, an expanding body of research has increasingly classified engagement in a wide range of common behaviours and leisure activities as possible behavioural addiction. If this expansion does not end, both the relevance and the credibility of the field of addictive disorders might be questioned, which may prompt a dismissive appraisal of the new DSM-5 subcategory for behavioural addiction. We propose an operational definition of behavioural addiction together with a number of exclusion criteria, to avoid pathologizing common behaviours and provide a common ground for further research. The definition and its exclusion criteria are clarified and justified by illustrating how these address a number of theoretical and methodological shortcomings that result from existing conceptualizations. We invite other researchers to extend our definition under an Open Science Foundation framework.

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See detailFunctional impairment matters in the screening and diagnosis of gaming disorder
Billieux, Joël; King, Daniel Luke; Higuchi, Susumu; Achab, Sophia; Bowden-Jones, Henrietta; Hao, Wei; Long, Jiang; Lee, Hae Kook; Potenza, Marc N; Saunders, John B; Poznyak, Vladimir

in Journal of Behavioral Addictions (2017), 6(3), 285-289

This commentary responds to Aarseth et al.’s (in press) criticisms that the ICD-11 Gaming Disorder proposal would result in “moral panics around the harm of video gaming” and “the treatment of abundant false-positive cases.” The ICD-11 Gaming Disorder avoids potential “overpathologizing” with its explicit reference to functional impairment caused by gaming and therefore improves upon a number of flawed previous approaches to identifying cases with suspected gaming-related harms. We contend that moral panics are more likely to occur and be exacerbated by misinformation and lack of understanding, rather than proceed from having a clear diagnostic system

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See detailSelf-reported dependence on mobile phones in young adults: A European cross-cultural empirical survey.
Lopez-Fernandez, Olatz; Kuss, Daria J.; Romo, Lucia; Morvan, Yannick; Kern, Laurence; Graziani, Pierluigi; Rousseau, Amelie; Rumpf, Hans-Jurgen; Bischof, Anja; Gassler, Ann-Kathrin; Schimmenti, Adriano; Passanisi, Alessia; Mannikko, Niko; Kaarianen, Maria; Demetrovics, Zsolt; Kiraly, Orsolya; Choliz, Mariano; Zacares, Juan Jose; Serra, Emilia; Griffiths, Mark D.; Pontes, Halley M.; Lelonek-Kuleta, Bernadeta; Chwaszcz, Joanna; Zullino, Daniele; Rochat, Lucien; Achab, Sophia; Billieux, Joël

in Journal of behavioral addictions (2017), 6(2), 168-177

Background and aims Despite many positive benefits, mobile phone use can be associated with harmful and detrimental behaviors. The aim of this study was twofold: to examine (a) cross-cultural patterns of perceived dependence on mobile phones in ten European countries, first, grouped in four different regions (North: Finland and UK; South: Spain and Italy; East: Hungary and Poland; West: France, Belgium, Germany, and Switzerland), and second by country, and (b) how socio-demographics, geographic differences, mobile phone usage patterns, and associated activities predicted this perceived dependence. Methods A sample of 2,775 young adults (aged 18-29 years) were recruited in different European Universities who participated in an online survey. Measures included socio-demographic variables, patterns of mobile phone use, and the dependence subscale of a short version of the Problematic Mobile Phone Use Questionnaire (PMPUQ; Billieux, Van der Linden, & Rochat, 2008). Results The young adults from the Northern and Southern regions reported the heaviest use of mobile phones, whereas perceived dependence was less prevalent in the Eastern region. However, the proportion of highly dependent mobile phone users was more elevated in Belgium, UK, and France. Regression analysis identified several risk factors for increased scores on the PMPUQ dependence subscale, namely using mobile phones daily, being female, engaging in social networking, playing video games, shopping and viewing TV shows through the Internet, chatting and messaging, and using mobile phones for downloading-related activities. Discussion and conclusions Self-reported dependence on mobile phone use is influenced by frequency and specific application usage.

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See detailOnline sexual activities: An exploratory study of problematic and non-problematic usage patterns in a sample of men
Wéry, A.; Billieux, Joël

in Computers in Human Behavior (2016), 56

Involvement in online sexual activities (OSAs) is ubiquitous, especially in males, and can under certain circumstances become problematic. The risk factors associated with problematic OSAs remain, however, poorly explored. The current study aimed to investigate the characteristics, usage patterns, and motives for men to engage in OSAs and to disentangle the risk factors associated with problematic OSAs. To this end, 434 men completed an online survey measuring socio-demographic information, OSAs consumption habits, motives for engaging in OSAs, symptoms of problematic OSAs, and sexual dysfunctions. Results showed that watching pornography is the most prevalent OSA, and sexual gratification is the most frequent motive for OSAs involvement. Additional multiple regression analyses indicated that the following characteristics are associated with problematic use of OSAs: (a) partnered-arousal activities (e.g., sex chat) and solitary-arousal activities (e.g., pornography); (b) anonymous fantasizing and mood regulation motives; and (c) higher sexual desire, lower overall sexual satisfaction, and lower erectile function. This study sheds new light on the characteristics, motives, and sexual function of men involved in OSAs, emphasizing that problematic OSAs are heterogeneous and depend on interrelated factors. The findings support tailoring of preventive actions and clinical interventions to both OSA type and individual risk factors. © 2015 Elsevier Ltd. All rights reserved.

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See detailWhere do Gambling and Internet ‘Addictions’ Belong? The Status of ‘Other’ Addictions (volume 2)
Griffiths, Mark; Kuss, Daria; Pontes, Halley; Billieux, Joël

in Wolff, K; White, J; Karch, S (Eds.) The SAGE Handbook of Drug and Alcohol Studies: Biological Approaches (2016)

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See detailBinge drinking is characterized by decisions favoring positive and discounting negative consequences  
Bø, Ragnhild; Billieux, Joël; Landrø, Nils Inge

in Addiction Research and Theory (2016), 24(6), 499-506

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See detailThe Short French Internet Addiction Test Adapted to Online Sexual Activities: Validation and Links With Online Sexual Preferences and Addiction Symptoms.
Wery, Aline; Burnay, Jonathan; Karila, Laurent; Billieux, Joël

in Journal of sex research (2016), 53(6), 701-10

The goal of this study was to investigate the psychometric properties of a French version of the short Internet Addiction Test adapted to online sexual activities (s-IAT-sex). The French version of the s-IAT-sex was administered to a sample of 401 men. The participants also completed a questionnaire that screened for sexual addiction (PATHOS). The relationships of s-IAT-sex scores with time spent online for online sexual activities (OSAs) and the types of OSAs favored were also considered. Confirmatory analyses supported a two-factor model of s-IAT-sex, corresponding to the factorial structure found in earlier studies that used the short IAT. The first factor regroups loss of control and time management, whereas the second factor regroups craving and social problems. Internal consistency for each factor was evaluated with Cronbach's alpha coefficient, resulting in .87 for Factor 1, .76 for Factor 2, and .88 for the global scale. Concurrent validity was supported by relationships with symptoms of sexual addiction, types of OSAs practiced, and time spent online for OSAs. The prevalence of sexual addiction (measured by PATHOS) was 28.1% in the current sample of self-selected male OSA users. The French version of the s-IAT-sex presents good psychometric properties and constitutes a useful tool for researchers and practitioners.

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See detailWhich facets of impulsivity predict binge drinking?
Bø, R.; Billieux, Joël; Landrø, N. I.

in Addictive Behaviors Reports (2016), 3

Background: Impulsive binge drinking is a serious public health issue, and to reveal predisposing factors to this consumption pattern is, therefore, required. Impulsivity-related traits are important predictors of alcohol use and abuse. Nonetheless, previous research in binge drinking has been confounded by various definitions and cut-off scores, implying that existing studies contributed to limited comprehension on the specific role of different impulsivity facets. The current study thus disentangles the role of impulsivity facets in binge drinking by adopting a dimensional approach, considering the condition on a continuum, to avoid relying on debatable and non-definitive criteria. Methods: 162 students underwent assessment of alcohol consumption, including drinking patterns and impulsive traits, as captured in the UPPS-P framework (i.e., negative urgency, positive urgency, sensation seeking, lack of perseverance, lack of premeditation). Multiple regression analyses were utilized in order to investigate the predictive role of each impulsivity facet in binge drinking. Results: Binge drinking was associated with sensation seeking. However, when statistically controlling for gender, age and global alcohol consumption, this effect disappeared, and negative urgency remained the only impulsivity component that significantly predicted binge drinking. Conclusion: We found the severity of binge drinking to be associated with negative urgency, suggesting that the binge drinking pattern is displayed in reaction to negative emotional states, and can be conceptualized as a maladaptive and short-term emotional coping. The study calls for prevention and treatment interventions designed to improve self-control, and more adaptive emotion regulation strategies. © 2016 .

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See detailA Mindfulness-Based Group Intervention for Enhancing Self-Regulation of Emotion in Late Childhood and Adolescence: A Pilot Study
Deplus, S.; Billieux, Joël; Scharff, C.; Philippot, P.

in International Journal of Mental Health and Addiction (2016), 14(5), 775-790

Emotion dysregulation is strongly implicated in the development of psychological problems during adolescence. The purpose of this study was to examine the feasibility and acceptability of an intervention for enhancing self-regulation of emotion in adolescents, adapted from Mindfulness-based Cognitive Therapy. We studied the impact of the intervention on depressive symptoms, as well as on transdiagnostic psychological processes related to emotional regulation, namely impulsivity and ruminative thinking. Twenty-one participants aged between 11 and 19 years were offered a nine-session group intervention. Adolescents completed standardized questionnaires before and after the training. This intervention was found to increase self-reported mindfulness and was well-accepted by adolescents, as estimated by the low dropout rate. As expected, a decrease was observed in depressive symptoms, in specific impulsivity facets (urgency and lack of perseverance), and in internal-dysfunctional strategies of emotion regulation (especially in unconstructive repetitive thoughts). The present findings provide preliminary support for a group intervention for adolescents characterized by emotion regulation difficulties, targeting transdiagnostic psychological processes (impulsivity and ruminative thinking). Furthermore, by potentially enhancing self-regulation skills, this intervention might constitute an effective method for general prevention of psychological disorders in late childhood and adolescence. © 2016, Springer Science+Business Media New York.

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See detailThe synthetic cannabinoids phenomenon
Karila, Laurent; Benyamina, Amine; Blecha, L; Cottencin, Olivier; Billieux, Joël

in Current Pharmaceutical Design (2016), 22(42), 6420-6425

« Spice » is generally used to describe the diverse types of herbal blends that encompass synthetic cannabinoids on the market. The emergence of smokable herbal products containing synthetic cannabinoids, which mimic the effects of cannabis, appears to become increasingly popular, in the new psychoactive substances landscape. In 2014, the existence of 134 different types of synthetic cannabinoids were reported by the European Union Early Warning System. These drugs are mainly sold online as an alternative to controlled and regulated psychoactive substances. They appear to have a life cycle of about 1-2 years before being replaced by a next wave of products. Legislation controlling these designer drugs has been introduced in many countries with the objective to limit the spread of existing drugs and control potential new analogs. The majority of the synthetic cannabinoids are full agonists at the CB1 receptor and do not contain tobacco or cannabis. They are becoming increasingly popular in adolescents, students and clubbers as an abused substance. Relatively high incidence of adverse effects associated with synthetic cannabinoids use has been documented in the literature. Numerous fatalities linked with their use and abuse have been reported. In this paper, we will review the available data regarding the use and effects of synthetic cannabinoids in humans in order to highlight their impact on public health. To reach this objective, a literature search was performed on two representative databases (Pubmed, Google Scholar), the Erowid Center website (a US non-profit educational organization that provides information about psychoactive plants and chemicals), and various governmental websites. The terms used for the database search were: "synthetic cannabinoids", "spice", "new psychoactive substances", and/or "substance use disorder", and/or "adverse effects", and/or "fatalities". The search was limited to years 2005 to 2016 due to emerging scientific literature at this period Health professionals should take into account that limited scientific evidence is available regarding the effect of synthetic cannabinoids use in humans. It thus urges to launch more systematic epidemiological studies, to develop and validate screening procedures, and to investigate the neurobiological and psychological correlates and risk factors associated to synthetic cannabinoids use and misuse.

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See detailAddiction à Internet – Le cas des jeux vidéo en ligne (chapitre 120)
Deleuze, Jory; Maurage, Pierre; de Timary, Philippe; Billieux, Joël

in Reynaud, M.; Karila, L.; Aubin, H.-A.; Benyamina, A. (Eds.) Traité d’Addictologie (2ème édition) (2016)

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See detailBinge Drinkers Are Fast, Able to Stop - but They Fail to Adjust.
Bo, Ragnhild; Aker, Martin; Billieux, Joël; Landro, Nils Inge

in Journal of the International Neuropsychological Society (2016), 22(1), 38-46

Binge drinking leads to brain damage. However, at present few studies have taken into account the continuity in the binge drinking phenomenon, and treated binge drinking as a clearly separable category from other types of drinking patterns. The aim of the present study was to investigate whether severity of binge drinking can predict specific neurocognitive changes in healthy young adults. A total of 121 students aged 18 to 25 were assessed by means of the three last questions of the Alcohol Use Questionnaire combined into binge score. The binge score was entered as a predictor of cognitive performance of the CANTAB Stop Signal Task including reaction time, inhibition processing time, and response adjustment. Anxiety and depression symptoms were also measured. Binge score significantly predicted less adjustment following failures, and faster reaction times. Binge score did not predict inhibition performance. Symptoms of depression and anxiety were not significantly related to binge score. Binge drinking in healthy young adults predicts impairment in response adjustment and fast reaction time, but is unrelated to inhibition. The study supports the view that binge drinking is a continuous phenomenon, rather than discrete category, and the findings are possibly shedding light on why binge drinkers continue their drinking pattern despite negative consequences. (JINS, 2016, 22, 38-46).

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See detailThe evolution of Internet addiction: A global perspective.
Griffiths, Mark D.; Kuss, Daria J.; Billieux, Joël; Pontes, Halley M.

in Addictive behaviors (2016), 53

Kimberly Young's initial work on Internet addiction (IA) was pioneering and her early writings on the topic inspired many others to carry out research in the area. Young's (2015) recent paper on the 'evolution of Internet addiction' featured very little European research, and did not consider the main international evidence that has contributed to our current knowledge about the conceptualization, epidemiology, etiology, and course of Internet-related disorders. This short commentary paper elaborates on important literature omitted by Young that the present authors believe may be of use to researchers. We also address statements made in Young's (2015) commentary that are incorrect (and therefore misleading) and not systematically substantiated by empirical evidence.

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See detailThe effects and risks associated to mephedrone and methylone in humans: A review of the preliminary evidences.
Karila, Laurent; Billieux, Joël; Benyamina, Amine; Lancon, Christophe; Cottencin, Olivier

in Brain research bulletin (2016), 126(Pt 1), 61-67

New psychoactive substances have drastically modified the world drug scene. An increasingly popular class comprises synthetic or substituted cathinones (legal highs, research chemicals, bath salts). Among the most common psychoactive constituents of bath salts are mephedrone and methylone. Recent reports on the abuse of novel synthetic cathinone derivatives call attention to the serious physical and psychological risks resulting from their consumption, thereby emphasizing the growing use of these drugs might constitute an important public health issue. In this paper, we will review the available data regarding the use and effects of mephedrone and methylone in humans in order to highlight their impact on public health. To reach this objective, a literature search was performed on two representative databases (Pubmed, Google Scholar), the Erowid Center website (a US non-profit educational organization that provides information about psychoactive plants and chemicals), and various governmental websites. The terms used for the database search were "mephedrone", "methylone", "new psychoactive substances", "synthetic cathinones", "substituted cathinones", "substance abuse", "substance use disorder", "adverse effects", "fatalities". The literature search was limited to years 2005-2015 and led to the identification of 71 potentially relevant articles. To date, the actual prevalence rates of their use remains difficult to estimate. Important health-related issues have emerged in relation to the somatic, psychiatric, and addictive consequences of their use. The potential chronic health effects of their prolonged use remain to date unknown (e.g., reproductive toxicity, genotoxicity and carcinogenic potential). Treatment for patients with prolonged exposure to synthetic cathinones should ideally include a drug management plan coupled with psychotherapy taking place in a structured program of care.

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See detailThe effects of a documentary film about schizophrenia on cognitive, affective and behavioural aspects of stigmatisation.
Thonon, Benedicte; Pletinx, Amandine; Grandjean, Allison; Billieux, Joël; Laroi, Frank

in Journal of behavior therapy and experimental psychiatry (2016), 50

BACKGROUND AND OBJECTIVES: Stereotypes about schizophrenia may lead to prejudicial attitudes and discrimination with debilitating effects on people diagnosed with schizophrenia. There is thus a need to develop interventions aiming to prevent, reduce or eliminate such stereotypes. The aim of this study was to evaluate the effects of a documentary film on schizophrenia on cognitive, affective and behavioural aspects of stigmatisation. METHODS: Forty-nine participants were assessed on measures of stereotypes and social distance, and on the Model of Stereotype Content, which includes measures of stereotypes, emotional reactions and behavioural tendencies. Participants were randomly assigned into either a condition in which they viewed the documentary film (Film group), or into a control condition in which no intervention was conducted (Control group). RESULTS: Only participants in the Film group revealed a significant decrease of negative stereotypes (Dangerousness and Unpredictability) and desired Social distance, and a significant increase in the perception of sociability in persons with schizophrenia. LIMITATIONS: Small sample size and its reduced generalizability are the main limitations in this study. CONCLUSIONS: These findings suggest that a documentary film promoting indirect contact with people diagnosed with schizophrenia is a promising tool to prevent and reduce stigmatisation regarding schizophrenia..

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See detailImpulsivity in Multiplayer Online Battle Arena Gamers: Preliminary Results on Experimental and Self-Report Measures.
Nuyens, Filip; Deleuze, Jory; Maurage, Pierre; Griffiths, Mark D.; Kuss, Daria J.; Billieux, Joël

in Journal of Behavioral Addictions (2016), 5(2), 351-6

Background and aims Multiplayer Online Battle Arena (MOBA) games have become the most popular type of video games played worldwide, superseding the playing of Massively Multiplayer Online Role-Playing Games and First-Person Shooter games. However, empirical studies focusing on the use and abuse of MOBA games are still very limited, particularly regarding impulsivity, which is an indicator of addictive states but has not yet been explored in MOBA games. In this context, the objective of the present study is to explore the associations between impulsivity and symptoms of addictive use of MOBA games in a sample of highly involved League of Legends (LoL, currently the most popular MOBA game) gamers. Methods Thirty-six LoL gamers were recruited and completed both experimental (Single Key Impulsivity Paradigm) and self-reported impulsivity assessments (s-UPPS-P Impulsive Behavior Scale, Barratt Impulsiveness Scale), in addition to an assessment of problematic video game use (Problematic Online Gaming Questionnaire). Results Results showed links between impulsivity-related constructs and signs of excessive MOBA game involvement. Findings indicated that impaired ability to postpone rewards in an experimental laboratory task was strongly related to problematic patterns of MOBA game involvement. Although less consistent, several associations were also found between self-reported impulsivity traits and signs of excessive MOBA game involvement. Conclusions Despite these results are preliminary and based upon a small (self-selected) sample, the present study highlights potential psychological factors related to the addictive use of MOBA games.

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See detailThe relationship between addictive use of social media and video games and symptoms of psychiatric disorders: A large-scale cross-sectional study.
Schou Andreassen, Cecilie; Billieux, Joël; Griffiths, Mark D.; Kuss, Daria J.; Demetrovics, Zsolt; Mazzoni, Elvis; Pallesen, Stale

in Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors (2016), 30(2), 252-62

Over the last decade, research into "addictive technological behaviors" has substantially increased. Research has also demonstrated strong associations between addictive use of technology and comorbid psychiatric disorders. In the present study, 23,533 adults (mean age 35.8 years, ranging from 16 to 88 years) participated in an online cross-sectional survey examining whether demographic variables, symptoms of attention-deficit/hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), anxiety, and depression could explain variance in addictive use (i.e., compulsive and excessive use associated with negative outcomes) of two types of modern online technologies: social media and video games. Correlations between symptoms of addictive technology use and mental disorder symptoms were all positive and significant, including the weak interrelationship between the two addictive technological behaviors. Age appeared to be inversely related to the addictive use of these technologies. Being male was significantly associated with addictive use of video games, whereas being female was significantly associated with addictive use of social media. Being single was positively related to both addictive social networking and video gaming. Hierarchical regression analyses showed that demographic factors explained between 11 and 12% of the variance in addictive technology use. The mental health variables explained between 7 and 15% of the variance. The study significantly adds to our understanding of mental health symptoms and their role in addictive use of modern technology, and suggests that the concept of Internet use disorder (i.e., "Internet addiction") as a unified construct is not warranted.

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See detailCapitalizing upon the Attractive and Addictive Properties of Massively Multiplayer Online Role-Playing Games to Promote Wellbeing.
Thorens, Gabriel; Billieux, Joël; Megevand, Pierre; Zullino, Daniele; Rothen, Stephane; Achab, Sophia; Khazaal, Yasser

in Frontiers in Psychiatry (2016), 7

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See detailGambling and problem gambling in Switzerland.
Billieux, Joël; Achab, Sophia; Savary, Jean-Felix; Simon, Olivier; Richter, Frederic; Zullino, Daniele; Khazaal, Yasser

in Addiction (2016), 111(9), 1677-83

AIMS: To provide an overview of gambling and problem gambling in Switzerland, including historical aspects, past and current legislation and policies, treatment options and the research base. METHODS: A literature search was conducted on two databases (PubMed and PsycINFO), and official government and statistical reports selected from the official websites of four sources (Federal Office of Justice; Federal Gambling Board; Federal Office of Statistics; Swiss Lottery and Betting Board). RESULTS: After a history of banning or partial banning, Swiss gambling became regulated at the beginning of the 20th century through successive laws. The current system is characterized by important differences in the law and policies for casinos and lotteries, and contradictions in the regulation of these two areas are still under debate in order to develop new legislation. Gambling is widespread in Switzerland, and the prevalence of problem gambling in this country was comparable to that in other European countries in 2014. Most gambling treatment facilities are integrated into mental health treatment services that have out-patient programmes, and treatment for problem gambling is covered by a universal compulsory Swiss health insurance system. The availability of public funding for gambling research is still limited. CONCLUSIONS: Switzerland needs to develop a more coherent regulatory and prevention policy approach to gambling, overcoming conflicts in the current dual system of federal and cantonal regulation. Recent efforts to enhance funding for gambling research are promising, and could lead to a more systematic analysis of the efficacy of prevention and treatment programmes.

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See detailCharacteristics of self-identified sexual addicts in a behavioral addiction outpatient clinic.
Wery, Aline; Vogelaere, Kim; Challet-Bouju, Gaelle; Poudat, Francois-Xavier; Caillon, Julie; Lever, Delphine; Billieux, Joël; Grall-Bronnec, Marie

in Journal of Behavioral Addictions (2016), 5(4), 623-630

Background and aims Research on sexual addiction flourished during the last decade, promoted by the development of an increased number of online sexual activities. Despite the accumulation of studies, however, evidence collected in clinical samples of treatment-seeking people remains scarce. The aim of this study was to describe the characteristics (socio-demographics, sexual habits, and comorbidities) of self-identified "sexual addicts." Methods The sample was composed of 72 patients who consulted an outpatient treatment center regarding their sexual behaviors. Data were collected through a combination of structured interviewing and self-report measures. Results Most patients were males (94.4%) aged 20-76 years (mean 40.3 +/- 10.9). Endorsement of sexual addiction diagnosis varied from 56.9% to 95.8% depending on the criteria used. The sexual behaviors reported to have the highest degree of functional impairment were having multiple sexual partners (56%), having unprotected sexual intercourse (51.9%), and using cybersex (43.6%). Ninety percent of patients endorsed a comorbid psychiatric diagnosis, and 60.6% presented at least one paraphilia. Conclusions Results showed highly different profiles in terms of sexual preferences and behaviors, as well as comorbidities involved. These findings highlight the need to develop tailored psychotherapeutic interventions by taking into account the complexity and heterogeneity of the disorder.

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See detailDissociating emotional and cognitive empathy in pre-clinical and clinical Huntington's disease.
Maurage, Pierre; Lahaye, Magali; Grynberg, Delphine; Jeanjean, Anne; Guettat, Lamia; Verellen-Dumoulin, Christine; Halkin, Stephane; Heeren, Alexandre; Billieux, Joël; Constant, Eric

in Psychiatry research (2016), 237

Huntington's disease (HD) is centrally characterized by motor, neurocognitive and psychiatric symptoms, but impaired emotional decoding abilities have also been reported. However, more complex affective abilities are still to be explored, and particularly empathy, which is essential for social relations and is impaired in various psychiatric conditions. This study evaluates empathic abilities and social skills in pre-clinical and clinical HD, and explores the distinction between two empathy sub-components (emotional-cognitive). Thirty-six HD patients (17 pre-clinical) and 36 matched controls filled in the Empathy Quotient Scale, while controlling for psychopathological comorbidities. At the clinical stage of HD, no global empathy impairment was observed but rather a specific deficit for the cognitive sub-component, while emotional empathy was preserved. A deficit was also observed for social skills. Pre-clinical HD was not associated with any empathy deficit. Emotional deficits in clinical HD are thus not limited to basic emotion decoding but extend towards complex interpersonal abilities. The dissociation between impaired cognitive and preserved emotional empathy in clinical HD reinforces the proposal that empathy subtypes are sustained by distinct processes. Finally, these results underline the extent of distinct affective and social impairments in HD and the need to grasp them in clinical contexts.

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See detailPrevalence and correlates of problematic smartphone use in a large random sample of Chinese undergraduates.
Long, Jiang; Liu, Tie-Qiao; Liao, Yan-Hui; Qi, Chang; He, Hao-Yu; Chen, Shu-Bao; Billieux, Joël

in BMC psychiatry (2016), 16(1), 408

BACKGROUND: Smartphones are becoming a daily necessity for most undergraduates in Mainland China. Because the present scenario of problematic smartphone use (PSU) is largely unexplored, in the current study we aimed to estimate the prevalence of PSU and to screen suitable predictors for PSU among Chinese undergraduates in the framework of the stress-coping theory. METHODS: A sample of 1062 undergraduate smartphone users was recruited by means of the stratified cluster random sampling strategy between April and May 2015. The Problematic Cellular Phone Use Questionnaire was used to identify PSU. We evaluated five candidate risk factors for PSU by using logistic regression analysis while controlling for demographic characteristics and specific features of smartphone use. RESULTS: The prevalence of PSU among Chinese undergraduates was estimated to be 21.3%. The risk factors for PSU were majoring in the humanities, high monthly income from the family (>/=1500 RMB), serious emotional symptoms, high perceived stress, and perfectionism-related factors (high doubts about actions, high parental expectations). CONCLUSIONS: PSU among undergraduates appears to be ubiquitous and thus constitutes a public health issue in Mainland China. Although further longitudinal studies are required to test whether PSU is a transient phenomenon or a chronic and progressive condition, our study successfully identified socio-demographic and psychological risk factors for PSU. These results, obtained from a random and thus representative sample of undergraduates, opens up new avenues in terms of prevention and regulation policies.

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See detailAcute and Chronic Altitude-Induced Cognitive Dysfunction in Children and Adolescents.
Rimoldi, Stefano F.; Rexhaj, Emrush; Duplain, Herve; Urben, Sebastien; Billieux, Joël; Allemann, Yves; Romero, Catherine; Ayaviri, Alejandro; Salinas, Carlos; Villena, Mercedes; Scherrer, Urs; Sartori, Claudio

in The Journal of pediatrics (2016), 169

OBJECTIVE: To assess whether exposure to high altitude induces cognitive dysfunction in young healthy European children and adolescents during acute, short-term exposure to an altitude of 3450 m and in an age-matched European population permanently living at this altitude. STUDY DESIGN: We tested executive function (inhibition, shifting, and working memory), memory (verbal, short-term visuospatial, and verbal episodic memory), and speed processing ability in: (1) 48 healthy nonacclimatized European children and adolescents, 24 hours after arrival at high altitude and 3 months after return to low altitude; (2) 21 matched European subjects permanently living at high altitude; and (3) a matched control group tested twice at low altitude. RESULTS: Short-term hypoxia significantly impaired all but 2 (visuospatial memory and processing speed) of the neuropsychological abilities that were tested. These impairments were even more severe in the children permanently living at high altitude. Three months after return to low altitude, the neuropsychological performances significantly improved and were comparable with those observed in the control group tested only at low altitude. CONCLUSIONS: Acute short-term exposure to an altitude at which major tourist destinations are located induces marked executive and memory deficits in healthy children. These deficits are equally marked or more severe in children permanently living at high altitude and are expected to impair their learning abilities.

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See detailAbstract and concrete repetitive thinking modes in alcohol-dependence.
Grynberg, Delphine; de Timary, Philippe; Philippot, Pierre; D'Hondt, Fabien; Briane, Yasmine; Devynck, Faustine; Douilliez, Celine; Billieux, Joël; Heeren, Alexandre; Maurage, Pierre

in Journal of addictive diseases (2016), 35(4), 238-243

Emotional and interpersonal deficits play a crucial role in alcohol-related disorders as they predict alcohol consumption and relapse. Recent models of emotion regulation in psychopathology postulate that these deficits are centrally related to increased abstract/analytic repetitive thinking, combined with reduced concrete/experiential repetitive thinking. As this assumption has not been tested in addictions, this study aimed at investigating repetitive thinking modes in a large sample of alcohol-dependent individuals. One hundred recently detoxified alcohol-dependent individuals (29 females; mean age = 49.51-years-old) recruited during the 3rd week of their treatment in a detoxification center were compared to 100 healthy controls (29 females; mean age = 48.51-years-old) recruited in the experimenters' social network, matched at the group level for age, gender, and educational level. All participants completed the Mini Cambridge Exeter Repetitive Thought Scale measuring abstract/analytic and concrete/experiential repetitive thinking modes as well as complementary psychopathological measures (Beck Depression Inventory and State/Trait Anxiety Inventory). Alcohol-dependent individuals have similar levels of concrete repetitive thinking as controls but report significantly higher levels of abstract repetitive thinking (p < 0.001; d = 1.28). This effect remains significant after controlling for depression and anxiety. Relative to healthy controls, alcohol-dependent patients report more frequent use of abstract/analytic repetitive thinking, with preserved concrete/experiential thinking. Despite the cross-sectional nature of the study, the frequent use of abstract repetitive thinking thus appears to constitute a main feature of alcohol-dependence.

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See detailWorking towards an international consensus on criteria for assessing internet gaming disorder: a critical commentary on Petry et al. (2014).
Griffiths, Mark D.; van Rooij, Antonius J.; Kardefelt-Winther, Daniel; Starcevic, Vladan; Kiraly, Orsolya; Pallesen, Stale; Muller, Kai; Dreier, Michael; Carras, Michelle; Prause, Nicole; King, Daniel L.; Aboujaoude, Elias; Kuss, Daria J.; Pontes, Halley M.; Lopez Fernandez, Olatz; Nagygyorgy, Katalin; Achab, Sophia; Billieux, Joël; Quandt, Thorsten; Carbonell, Xavier; Ferguson, Christopher J.; Hoff, Rani A.; Derevensky, Jeffrey; Haagsma, Maria C.; Delfabbro, Paul; Coulson, Mark; Hussain, Zaheer; Demetrovics, Zsolt

in Addiction (Abingdon, England) (2016), 111(1), 167-75

See detailImpulsivité
Billieux, Joël

in Seron, X.; Fayol, M. (Eds.) Encylopedia Universalis (section Psychologie) (2015)

See detailAddiction, psychologie
Billieux, Joël

in Seron, X.; Fayol, M. (Eds.) Encylopedia Universalis (section psychologie) (2015)

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See detailProblematic digital gaming behavior and its relation to the psychological, social and physical health of Finnish adolescents and young adults.
Mannikko, Niko; Billieux, Joël; Kaariainen, Maria

in Journal of Behavioral Addictions (2015), 4(4), 281-8

BACKGROUND AND AIMS: The aim of this study was to identify problematic gaming behavior among Finnish adolescents and young adults, and evaluate its connection to a variety of psychological, social, and physical health symptoms. METHODS: This cross-sectional study was conducted with a random sample of 293 respondents aged from 13 to 24 years. Participants completed an online survey. Problematic gaming behavior was measured with the Game Addiction Scale (GAS). Self-reports covered health measures such as psychological health (psychopathological symptoms, satisfaction with life), social health (preferences for social interaction), and physical health (general health, Body Mass Index [BMI], body discomfort, physical activity). RESULTS: Problematic gaming behavior was found to relate to psychological and health problems, namely fatigue, sleep interference, depression and anxiety symptoms. Multiple linear regression indicated that the amount of weekly gaming, depression and a preference for online social interaction predicted increased problematic gaming symptoms. CONCLUSIONS: This research emphasized that problematic gaming behavior had a strong negative correlation to a variety of subjective health outcomes.

See detailInterventions psychologiques en psychopathologie cognitive
Van der Linden, Martial; Ceschi, Grazia; Billieux, Joël

Book published by De Boeck/Solal (2015)

Les thérapies génériques (thérapies cognitivo-comportementale, interpersonnelles, etc.) ont fait leurs preuves, mais un nombre substantiel de personnes traitées continue à présenter des symptômes résiduels ou rechutent rapidement.   Le développement de nouvelles interventions psychologiques focalisées sur les dysfonctionnements psychologiques spécifiques est alors primordial et représente un défi important pour la psychologie clinique. Les auteurs de cet ouvrage s’attachent donc à les décrire en caractérisant leurs principes méthodologiques et leurs fondements théoriques, et en rapportant les données qui démontrent leur efficacité, leurs spécificités, mais également leurs limites.   Ces interventions sont applicables à un large spectre de dysfonctionnements cognitifs affectant divers domaines de la cognition (attention, mémoire, jugement/interprétation, croyances métacognitives, etc.). Elles s’inscrivent dans une perspective transdiagnostique, et peuvent donc être utiles pour différents types de symptômes.

See detailL’entrainement attentionnel : Une technique transdiagnostique
Billieux, Joël; Ceschi, Grazia; Van der Linden, Martial

in Van der Linden, Martial; Ceschi, Grazia; Billieux, Joël (Eds.) Interventions psychologiques en psychopathologie cognitive (2015)

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See detailElectrophysiological correlates of problematic Internet use: Critical review and perspectives for future research.
D'Hondt, Fabien; Billieux, Joël; Maurage, Pierre

in Neuroscience and Biobehavioral Reviews (2015), 59

Problematic behaviors have emerged with the exponential development of the Internet access, with some individuals failing to constrain their Internet use despite its negative impact on their daily lives. Recent neuropsychological and neuroscience studies have suggested that problematic Internet use is notably associated with increased cue-reactivity and reduced inhibitory control. This review of the electroencephalography (EEG) literature shows that most studies have found that impaired self-control abilities (i.e., inhibition and error monitoring) are associated with underactivated frontal regions in problematic Internet users (PIUs). However, some EEG studies in the domain have also demonstrated alterations in the processing of Internet-related cues and emotional stimuli. As a whole, these data therefore suggest that both reflective (top-down) and automatic/affective (bottom-up) systems, postulated by dual-process models as being determinants in decision making, are impaired among PIUs. On this basis, new research avenues are proposed to better understand the development and maintenance of problematic Internet use, according to six main directions respectively related to (1) the identification of vulnerability biomarkers, (2) the investigation of possible lower level cognitive impairments, (3) the exploration of core reflective and automatic/affective symptoms, (4) the evaluation of Internet use heterogeneity and comorbidities, (5) the development of new neuroscience strategies and (6) the elaboration of behavioral and cognitive interventions.

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See detailWhich psychological factors influence Internet addiction? Evidence through an integrative model
Burnay, J.; Billieux, Joël; Blairy, S.; Larøi, F.

in Computers in Human Behavior (2015), 43

Since the appearance of Internet, several preoccupations have appeared as a result, with Internet addiction being one of the most common. The goals of the present study were twofold. First, to examine which psychological factors are relevant to explain Internet addiction, including impulsivity, passion and social provision. Second, to incorporate all these factors into an integrative model. Based on multiple regressions and path analysis, results revealed a positive relation between Internet addiction and specific impulsivity components (lack of perseverance, urgency) and obsessive passion. Moreover, positive relations were observed between obsessive passion and reassurance of worth, opportunity for nurturance, sensation seeking and harmonious passion. In other words, Internet addiction is related to obsessive passion, but is explained by different psychological factors. Accordingly, both Internet addiction and obsessive passion can be viewed as two important and complementary facets of problematic Internet use. ©2014 Elsevier B.V. All rights reserved.

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See detailLooking under the hood of executive function impairments in psychopathology: A commentary on "Advancing understanding of executive function impairments and psychopathology: bridging the gap between clinical and cognitive approaches".
Heeren, Alexandre; Billieux, Joël; Philippot, Pierre; Maurage, Pierre

in Frontiers in psychology (2015), 6

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See detailCan disordered mobile phone use be considered a behavioral addiction? An update on current evidence and a comprehensive model for future research
Billieux, Joël; Maurage, Pierre; Lopez-Fernandez, Olatz; Kuss, Daria; Griffiths, Mark

in Current Addiction Reports (2015), 2(2), 156-162

Despitethemanypositiveoutcomes,excessivemobile phone use is now often associated with potentially harmfuland/ordisturbingbehaviors(e.g.,symptomsofderegulated use, negative impact on various aspects of daily life such as relationship problems, and work intrusion). Problematic mobile phone use (PMPU) has generally been considered as a behavioral addiction that shares many features with more established drug addictions. In light of the most recent data, the current paper reviews the validity of the behavioral addictionmodel whenapplied toPMPU.Onthewhole,itisargued that the evidence supporting PMPU as an addictive behavior is scarce. In particular, it lacks studies that definitively show behavioral and neurobiological similarities between mobile phoneaddictionandothertypesoflegitimateaddictivebehaviors. Given this context, an integrative pathway model is proposed that aims to provide a theoretical framework to guide future research in the field of PMPU. This model highlights that PMPU is a heterogeneous and multi-faceted condition

See detailThe conceptualization and assessment of problematic mobile phone use
Lopez-Fernandez, Olatz; Kuss, Daria; Griffiths, Mark; Billieux, Joël

in Yan, Z. (Ed.) Encyclopedia of Mobile Phone Behavior (Volumes 2) (2015)

See detailAméliorer la réalisation d’intentions dans l’intervention psychologique: La méthode « si-alors »
Berner-Burkard, C.; Billieux, Joël; Van der Linden, Martial

in Van der Linden, Martial; Ceschi, Grazia; Billieux, Joël (Eds.) Interventions psychologiques en psychopathologie cognitive (2015)

See detailApprendre à négliger le mauvais côté des choses: La modification des biais cognitifs
Ceschi, Grazia; Heeren, Alexandre; Billieux, Joël; Van der Linden, Martial

in Van der Linden, Martial; Ceschi, Grazia; Billieux, Joël (Eds.) Interventions psychologiques en psychopathologie cognitive (2015)

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See detailAre we overpathologizing everyday life? A tenable blueprint for behavioral addiction research.
Billieux, Joël; Schimmenti, Adriano; Khazaal, Yasser; Maurage, Pierre; Heeren, Alexandre

in Journal of Behavioral Addictions (2015), 4(3), 119-23

Background Behavioral addiction research has been particularly flourishing over the last two decades. However, recent publications have suggested that nearly all daily life activities might lead to a genuine addiction. Methods and aim In this article, we discuss how the use of atheoretical and confirmatory research approaches may result in the identification of an unlimited list of "new" behavioral addictions. Results Both methodological and theoretical shortcomings of these studies were discussed. Conclusions We suggested that studies overpathologizing daily life activities are likely to prompt a dismissive appraisal of behavioral addiction research. Consequently, we proposed several roadmaps for future research in the field, centrally highlighting the need for longer tenable behavioral addiction research that shifts from a mere criteria-based approach toward an approach focusing on the psychological processes involved.

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See detailA multidimensional approach of impulsivity in adult attention deficit hyperactivity disorder.
Lopez, Regis; Dauvilliers, Yves; Jaussent, Isabelle; Billieux, Joël; Bayard, Sophie

in Psychiatry research (2015), 227(2-3), 290-5

We aimed to compare adult patients with attention deficit hyperactivity disorder (ADHD) and matched controls on four dimensions of impulsivity (urgency, lack of premeditation, lack of perseverance, and sensation seeking) and to examine the association between impulsivity and ADHD symptoms. The study was conducted on 219 participants: 72 adult ADHD patients and 147 aged and gender matched controls. All participants completed questionnaires measuring the various facets of impulsivity (UPPS Impulsive Behavior Scale), ADHD and depressive symptoms severity. Patients were also assessed for ADHD subtypes, mood disorders, and addictive behaviors. ADHD patients exhibited higher urgency, lower premeditation and lower perseverance in comparison to controls. Lack of perseverance showed the strongest association with ADHD (area under curve=0.95). Patients with combined inattentive and hyperactive/impulsive subtypes reported more frequently substance abuse problems and had higher scores on urgency and sensation seeking dimensions of impulsivity than those with predominantly inattentive subtype. We report for the first time a multidimensional evaluation of impulsivity in adult ADHD patients. The UPPS Impulsive Behavior Scale may constitute a useful screening tool for ADHD in adults and may help to further understanding the psychological mechanisms underlying the differences between the ADHD subgroups.

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See detailReduced inhibitory control predicts persistence in laboratory slot machine gambling
Devos, G.; Clark, L.; Maurage, P.; Kazimierczuk, M.; Billieux, Joël

in International Gambling Studies (2015), 15(3), 408-421

Impairments in inhibitory control characterize a range of addictive behaviours including gambling disorder. This study investigated the relationship between a neuropsychological measure of inhibitory control and behaviour on a simulated slot machine that included a measure of gambling persistence, in a non-clinical sample of regular gamblers. Regular gamblers (n =  75) performed a laboratory slot machine task for 30 trials where they could win real money, followed by a persistence phase under extinction (i.e. without wins). Participants also completed a stop-signal task, along with measures of gambling-related cognitions, social desirability, and symptoms of disordered gambling. In hierarchical regression models, reduced inhibitory control was found to predict greater persistence and a higher subjective desire to play again after both wins and near-misses (i.e. unsuccessful outcomes close to the jackpot). These data illustrate the impact of low inhibitory control on relevant behavioural tendencies in a group of regular gamblers. Our results help elucidate a cognitive process that may contribute to problem gambling, with implications for screening and treatment. © 2015 Taylor & Francis.

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See detailCovariance and specificity in adolescent schizotypal and borderline trait expression.
Badoud, Deborah; Billieux, Joël; Eliez, Stephan; Imhof, Anouk; Heller, Patrick; Eytan, Ariel; Debbane, Martin

in Early intervention in psychiatry (2015), 9(5), 378-87

AIMS: The first aim of the present study is to assess the overlap between borderline and schizotypal traits during adolescence. The second objective is to examine whether some psychological factors (i.e. cognitive coping mechanisms, impulsivity and encoding style) are differentially related to borderline and schizotypal traits and may therefore improve the efficiency of clinical assessments. METHODS: One hundred nineteen community adolescents (57 male) aged from 12 to 19 years completed a set of questionnaires evaluating the expression of borderline and schizotypal traits as well as cognitive emotion regulation (CER), impulsivity and encoding style. RESULTS: Our data first yielded a strong correlation between borderline and schizotypal scores (r = 0.70, P < 0.001). Secondly, linear regression models indicated that the 'catastrophizing' CER strategy and the 'lack of premeditation' impulsivity facet accounted for the level of borderline traits, whereas an internal encoding style predominantly explained schizotypal traits. CONCLUSIONS: Our results support the abundant literature showing that borderline and schizotypal traits frequently co-occur. Moreover, we provide original data indicating that borderline and schizotypal traits during adolescence are linked to different specific psychological mechanisms. Thus, we underline the importance of considering these mechanisms in clinical assessments, in particular to help disentangle personality disorder traits in youths.

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See detailIs Dysfunctional Use of the Mobile Phone a Behavioural Addiction? Confronting Symptom-Based Versus Process-Based Approaches.
Billieux, Joël; Philippot, Pierre; Schmid, Cecile; Maurage, Pierre; De Mol, Jan; Van der Linden, Martial

in Clinical Psychology and Psychotherapy (2015), 22(5), 460-8

UNLABELLED: Dysfunctional use of the mobile phone has often been conceptualized as a 'behavioural addiction' that shares most features with drug addictions. In the current article, we challenge the clinical utility of the addiction model as applied to mobile phone overuse. We describe the case of a woman who overuses her mobile phone from two distinct approaches: (1) a symptom-based categorical approach inspired from the addiction model of dysfunctional mobile phone use and (2) a process-based approach resulting from an idiosyncratic clinical case conceptualization. In the case depicted here, the addiction model was shown to lead to standardized and non-relevant treatment, whereas the clinical case conceptualization allowed identification of specific psychological processes that can be targeted with specific, empirically based psychological interventions. This finding highlights that conceptualizing excessive behaviours (e.g., gambling and sex) within the addiction model can be a simplification of an individual's psychological functioning, offering only limited clinical relevance. KEY PRACTITIONER MESSAGE: The addiction model, applied to excessive behaviours (e.g., gambling, sex and Internet-related activities) may lead to non-relevant standardized treatments. Clinical case conceptualization allowed identification of specific psychological processes that can be targeted with specific empirically based psychological interventions. The biomedical model might lead to the simplification of an individual's psychological functioning with limited clinical relevance.

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See detailImplicitly assessed attitudes toward body shape and food: the moderating roles of dietary restraint and disinhibition.
Moussally, Joanna Myriam; Billieux, Joël; Mobbs, Olivia; Rothen, Stephane; Van der Linden, Martial

in Journal of eating disorders (2015), 3

BACKGROUND: Attitudes toward body shape and food play a role in the development and maintenance of dysfunctional eating behaviors. Nevertheless, they are rarely investigated together. Therefore, this study aimed to explore the interrelationships between implicitly assessed attitudes toward body shape and food and to investigate the moderating effect on these associations of interindividual differences in problematic and nonproblematic eating behaviors (i.e., flexible versus rigid cognitive control dimension of restraint, disinhibition). METHODS: One hundred and twenty-one young women from the community completed two adapted versions of the Affect Misattribution Procedure to implicitly assess attitudes toward body shape (i.e., thin and overweight bodies) and food (i.e., "permitted" and "forbidden" foods), as well as the Three-Factor Eating Questionnaire to evaluate restraint and disinhibition. RESULTS: The results revealed that an implicit preference for thinness was positively associated with a positive attitude toward permitted (i.e., low-calorie) foods. This congruence between implicitly assessed attitudes toward body shape and food was significant at average and high levels of flexible control (i.e., functional component of eating). Moreover, an implicit preference for thinness was also positively associated with a positive attitude toward forbidden (i.e., high-calorie) foods. This discordance between implicitly assessed attitudes was significant at average and high levels of rigid control and disinhibition (i.e., dysfunctional components of eating). CONCLUSIONS: These findings shed new light on the influence of congruent or discordant implicitly assessed attitudes toward body shape and food on normal and problematic eating behaviors; clinical implications are discussed.

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See detailFactor Structure of the Internet Addiction Test in Online Gamers and Poker Players.
Khazaal, Yasser; Achab, Sophia; Billieux, Joël; Thorens, Gabriel; Zullino, Daniele; Dufour, Magali; Rothen, Stephane

in JMIR Mental Health (2015), 2(2), 12

BACKGROUND: The Internet Addiction Test (IAT) is the most widely used questionnaire to screen for problematic Internet use. Nevertheless, its factorial structure is still debated, which complicates comparisons among existing studies. Most previous studies were performed with students or community samples despite the probability of there being more problematic Internet use among users of specific applications, such as online gaming or gambling. OBJECTIVE: To assess the factorial structure of a modified version of the IAT that addresses specific applications, such as video games and online poker. METHODS: Two adult samples-one sample of Internet gamers (n=920) and one sample of online poker players (n=214)-were recruited and completed an online version of the modified IAT. Both samples were split into two subsamples. Two principal component analyses (PCAs) followed by two confirmatory factor analyses (CFAs) were run separately. RESULTS: The results of principal component analysis indicated that a one-factor model fit the data well across both samples. In consideration of the weakness of some IAT items, a 17-item modified version of the IAT was proposed. CONCLUSIONS: This study assessed, for the first time, the factorial structure of a modified version of an Internet-administered IAT on a sample of Internet gamers and a sample of online poker players. The scale seems appropriate for the assessment of such online behaviors. Further studies on the modified 17-item IAT version are needed.

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See detailDevelopment and validation of a short Italian UPPS-P impulsive behavior scale
D'Orta, I.; Burnay, J.; Aiello, D.; Niolu, C.; Siracusano, A.; Timpanaro, L.; Khazaal, Y.; Billieux, Joël

in Addictive Behaviors Reports (2015), 2

Impulsivity is a multidimensional construct that plays a prominent role in the development, maintenance, and relapse of addictive disorders. The UPPS-P model of impulsivity, which distinguishes between five impulsivity components (positive urgency, negative urgency, lack of perseverance, lack of premeditation, sensation seeking), has been increasingly investigated during the last decade in relation to addictive and risky behaviors. Unfortunately, it currently lacks a validated scale that allows Italian researchers and clinicians to measure impulsivity based on the UPPS-P model. The current study fills this gap by testing the psychometric properties of a short 20-item Italian scale used to assess the five dimensions of the UPPS-P model in 188 volunteer participants from the community. Confirmatory factor analysis supported a model of five distinct, but interrelated, impulsivity components. The results indicated good internal consistency (Cronbach's α ranges from .73 to .84). Construct validity was evidenced by specific relations with measures of addictive behaviors and depressive symptoms. On the whole, this study demonstrated that the Italian short UPPS-P has good psychometric properties. © 2015 The Authors. Published by Elsevier B.V.

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See detailProblematic involvement in online games: A cluster analytic approach
Billieux, Joël; Thorens, G.; Khazaal, Y.; Zullino, D.; Achab, S.; Van Der Linden, M.

in Computers in Human Behavior (2015), 43

Playing online games can become problematic and engender adverse consequences. Several psychological factors have been shown to influence the development and the maintenance of this problematic behavior, including impulsivity traits, motives to play (immersion, achievement, social affiliation), and self-esteem. The aim of the current study is to determine whether reliable subtypes of problematic online gamers can be identified. A sample of 1057 online gamers was recruited. Validated questionnaires were used to measure established psychological risk factors (impulsivity, motives to play, self-esteem) and potential consequences of playing (addiction symptoms, positive and negative affect). Actual in-game behaviors were also monitored. Five reliable clusters of gamers were identified (three problematic and two nonproblematic clusters). Cluster comparison revealed that the psychological factors considered are differentially involved in problematic online gaming. At the theoretical level, the results emphasized that problem online gaming depends on a wide range of psychological factors. At the clinical level, the diversity of psychological profiles shown supports the development of personalized (custom-made) interventions targeting specific psychological mechanisms. Overall, our findings suggest that conceptualizing the problematic use of massively multiplayer online role-playing games as "behavioral addiction" is too restrictive and might result in the simplification of heterogeneous and multi-determined problematic behaviors. © 2014, Elsevier Ltd. All rights reserved.

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See detailDo emotional stimuli interfere with two distinct components of inhibition?
Rebetez, Marie My Lien; Rochat, Lucien; Billieux, Joël; Gay, Philippe; Van der Linden, Martial

in Cognition and Emotion (2015), 29(3), 559-67

Emotions have recently been shown to interfere with the efficacy of inhibitory control. However, understanding their impact requires taking into account that inhibition is not a unitary construct, but consists of distinct functions underlain by specific mechanisms. In this study, 88 participants performed two emotional versions of classic laboratory tasks designed to assess (1) the ability to inhibit a prepotent response (a stop-signal task using faces with different emotional expressions) and (2) the capacity to resist the effect of proactive interference (PI; a recent negative task that included emotional words). Overall results showed that emotional stimuli interfered with inhibition capacities in both tasks. Although tending in the same direction, these results suggest that different underlying mechanisms (e.g., top-down vs. bottom-up processes) or consecutive differences in emotional processing (e.g., different interactions with stimulus/task properties, processing stages or motivational aspects) are at play in these two inhibition-related functions.

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See detailPrevalence and characteristics of addictive behaviors in a community sample: A latent class analysis
Deleuze, J.; Rochat, L.; Romo, L.; Van der Linden, M.; Achab, S.; Thorens, G.; Khazaal, Y.; Zullino, D.; Maurage, P.; Rothen, S.; Billieux, Joël

in Addictive Behaviors Reports (2015), 1

While addictions to substances such as alcohol, tobacco, and other drugs have been extensively investigated, interest has been growing in potential non-substance-related addictive behaviors (e.g., excessive gambling, buying or playing video games). In the current study, we sought to determine the prevalence and characteristics of a wide range of addictive behaviors in a general population sample and to identify reliable subgroups of individuals displaying addictive behaviors.Seven hundred seventy participants completed an online survey. The survey screened for the presence and characteristics of the main recognized substance and behavioral addictions (alcohol, tobacco, cannabis, other drugs, gambling, compulsive shopping, intensive exercise, Internet and mobile phone overuse, intensive work involvement, and overeating) in a three-month period. Key aspects of addiction were measured for each reported behavior, including negative outcomes, emotional triggers (positive and negative emotional contexts), search for stimulation or pleasure, loss of control, and cognitive salience.Latent class analysis allowed us to identify three theoretically and clinically relevant subgroups of individuals. The first class groups problematic users, i.e., addiction-prone individuals. The second class groups at-risk users who frequently engage in potentially addictive behaviors to regulate emotional states (especially overinvolvement in common behaviors such as eating, working, or buying). The third class groups individuals who are not prone to addictive behaviors.The existence of different groups in the population sheds new light on the distinction between problematic and non-problematic addiction-like behaviors. © 2015 The Authors. Published by Elsevier B.V.

See detailUn rapport impérieux à l’alcool : réflexion clinique sur le « craving »
de Timary, Philippe; Billieux, Joël

in De Timary, Philippe; Toussain, Anne (Eds.) Sortir l'alcoolique de son isolement (2014)

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See detailBeyond inhibition: a dual-process perspective to renew the exploration of binge drinking.
Lannoy, Severine; Billieux, Joël; Maurage, Pierre

in Frontiers in human neuroscience (2014), 8

Binge drinking is a widespread alcohol-consumption pattern in youth and is linked to cognitive consequences, mostly for executive functions. However, other crucial factors remain less explored in binge drinking and notably the emotional-automatic processes. Dual-process model postulates that addictive disorders are not only due to impaired reflective system (involved in deliberate behaviors), but rather to an imbalance between under-activated reflective system and over-activated affective-automatic one (involved in impulsive behaviors). This proposal has been confirmed in alcohol-dependence, but has not been tested in binge drinking. The observation of comparable impairments in binge drinking and alcohol-dependence led to the "continuum hypothesis," suggesting similar deficits across different alcohol-related disorders. In this perspective, applying the dual-process model to binge drinking might renew the understanding of this continuum hypothesis. A three-axes research agenda will be proposed, exploring: (1) the affective-automatic system in binge drinking; (2) the systems' interactions and imbalance in binge drinking; (3) the evolution of this imbalance in the transition between binge drinking and alcohol-dependence.

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See detailInternet gaming addiction: The case of massively multiplayer online role playing games
Billieux, Joël; Deleuze, Jory; Griffiths, Mark; Kuss, Daria

in El-Guebaly, N.; Galanter, M.; Carrá, G. (Eds.) The Textbook of Addiction Treatment: International Perspectives (2014)

Internet gaming disorder is one of the main types of Internet-related disorders. Recently, and despite inconsistencies in classification and limited data regarding the etiology of the condition, Internet gaming disorder has been included in Sect. 3 (research appendix) of the DSM-5. The focus of the current chapter was the dysfunctional involvement in a specific type of video game which has some inherent characteristics reinforcing its addictive nature: Massively Multiplayer Online Role-Playing Games (MMORPGs). MMORPGs are indeed one of the most recent and popular types of video games played worldwide, and problematic and uncontrolled involvement in playing MMORPGs is the most frequently reported activity by people seeking help for an Internet-related problem. In this chapter, we first described the specific structural characteristics of MMORPGsthemselves (e.g., permanent world, reinforcement schedule, advancement systems, interface favoring social exchanges) and explained how they can increase their “addictive potential”. Then, the main psychological factors (motives to play, impulsivity traits) were reviewed alongside neurobiological features (e.g., changes in neural circuitry involved in controlled regulation of behavior and reward drive) related to the development and maintenance of MMORPG addiction. The few available studies having tested the efficacy of treatments targeting Internet and video game addictions were also briefly considered. Limitations of existing data are emphasized, and avenues for further research proposed (both at the theoretical and clinical levels).

See detailL’impulsivité: ses facettes, son évaluation et son expression clinique
Billieux, Joël; Rochat, Lucien; Van der Linden, Martial

Book published by Mardaga (2014)

L’impulsivité, définie globalement comme la tendance à exprimer des comportements excessifs et non planifiés, est un concept intégré dans les principaux modèles de la personnalité. L’impulsivité représente également une dimension psychologique importante pour la compréhension et le diagnostic d’un grand nombre de troubles psychopathologiques et neurologiques.  Les recherches récentes s’accordent sur la nécessité de considérer l’impulsivité comme un concept multidimensionnel et d’identifier les mécanismes psychologiques (cognitifs, affectifs, motivationnels) susceptibles de sous-tendre les diverses manifestations impulsives. Ce livre fait le point sur les recherches et les modèles théoriques actuels concernant l’impulsivité. Il vise aussi à décrire une large gamme d’outils validés permettant d’évaluer les différentes facettes de l’impulsivité et les mécanismes psychologiques qui y sont associés. Les outils présentés (avec leurs données normatives) dans cet ouvrage sont en utilisation libre de droits. Ce livre a également pour objectif de faire l’état des connaissances sur le rôle de l’impulsivité dans les troubles psychopathologiques et neurologiques, ainsi que sur les techniques d’intervention psychologique visant les conduites impulsives.

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See detailConceptualisation, évaluation et traitement de la dépendance cybersexuelle : Une revue de la littérature
Wéry, A.; Karila, L.; De Sutter, P.; Billieux, Joël

in Canadian Psychology (2014), 55(4), 266-281

The purpose of this article is to propose a critical review of current knowledge concerning cybersexual dependence (definition, epidemiology, evaluation and treatment). There is, in fact, a lack of consensus concerning the conceptualization of this disorder. This lack of conceptual clarity is largely due to the existence of a multitude of definitions of the disorder, a significant variety of sexual behaviours concerned and of symptomatologies, and because of methodological problems in the existing research (samples and evaluation tools that are strongly heterogeneous in different studies). Given the context, this article seeks to clarify the state of knowledge concerning cybersexual dependence. We will also make an inventory of empirically validated treatment methods for sexual and cybersexual dependence and we will propose approaches for future research. A non-systematic narrative review was conducted to examine and summarize the English and French literature dealing with cybersexual dependence. That review was carried out using a keyword search for sexual and cybersexual dependence in the data bases of PsycINFO, ISI Web of Science and Francis. Particular attention was paid to articles evaluating risk factors involved in sexual dependence, as well as articles that suggest treatment approaches for the disorder. © 2014 Canadian Psychological Association.

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See detailInternet addiction: a systematic review of epidemiological research for the last decade.
Kuss, D. J.; Griffiths, M. D.; Karila, L.; Billieux, Joël

in Current pharmaceutical design (2014), 20(25), 4026-52

In the last decade, Internet usage has grown tremendously on a global scale. The increasing popularity and frequency of Internet use has led to an increasing number of reports highlighting the potential negative consequences of overuse. Over the last decade, research into Internet addiction has proliferated. This paper reviews the existing 68 epidemiological studies of Internet addiction that (i) contain quantitative empirical data, (ii) have been published after 2000, (iii) include an analysis relating to Internet addiction, (iv) include a minimum of 1000 participants, and (v) provide a full-text article published in English using the database Web of Science. Assessment tools and conceptualisations, prevalence, and associated factors in adolescents and adults are scrutinised. The results reveal the following. First, no gold standard of Internet addiction classification exists as 21 different assessment instruments have been identified. They adopt official criteria for substance use disorders or pathological gambling, no or few criteria relevant for an addiction diagnosis, time spent online, or resulting problems. Second, reported prevalence rates differ as a consequence of different assessment tools and cut-offs, ranging from 0.8% in Italy to 26.7% in Hong Kong. Third, Internet addiction is associated with a number of sociodemographic, Internet use, and psychosocial factors, as well as comorbid symptoms and disorder in adolescents and adults. The results indicate that a number of core symptoms (i.e., compulsive use, negative outcomes and salience) appear relevant for diagnosis, which assimilates Internet addiction and other addictive disorders and also differentiates them, implying a conceptualisation as syndrome with similar etiology and components, but different expressions of addictions. Limitations include the exclusion of studies with smaller sample sizes and studies focusing on specific online behaviours. Conclusively, there is a need for nosological precision so that ultimately those in need can be helped by translating the scientific evidence established in the context of Internet addiction into actual clinical practice.

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See detailProbing smoking craving with a multidimensional approach: validation of the 12-item French-language version of the Questionnaire on Smoking Urges.
Dethier, Vincent; Heeren, Alexandre; Galanti, Laurence; Philippot, Pierre; Billieux, Joël

in Neuropsychiatric Disease and Treatment (2014), 10

BACKGROUND: The current study examined the psychometric properties of the 12-item French-language version of the Questionnaire on Smoking Urges (QSU-12), a widely used multidimensional measure of cigarette craving. METHODS: Daily smokers (n=230) completed the QSU-12, the Fagerstrom Test for Nicotine Dependence, and items about addiction-related symptoms. Additional participants (n=40) completed the QSU-12 and the Fagerstrom Test for Nicotine Dependence and were assessed for expired carbon monoxide. RESULTS: Consistent with studies validating the English version of the scale, confirmatory factor analyses supported a two-factor solution in the French version of the scale. Good scale and subscales reliabilities were observed, and convergent validity was evidenced through relationships with dependence and addiction-related symptoms. CONCLUSION: The French-language version of the QSU-12 is an adequate instrument to assess the multidimensional construct of craving in both research and clinical practice.

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See detailAttentional alterations in alcohol dependence are underpinned by specific executive control deficits.
Maurage, Pierre; de Timary, Philippe; Billieux, Joël; Collignon, Marie; Heeren, Alexandre

in Alcoholism, clinical and experimental research (2014), 38(7), 2105-12

BACKGROUND: Attentional biases and deficits play a central role in the development and maintenance of alcohol dependence, but the underlying attentional processes accounting for these deficits have been very little explored. Importantly, the differential alterations across the 3 attentional networks (alerting, orienting, and executive control) remain unclear in this pathology. METHODS: Thirty recently detoxified alcohol-dependent individuals and 30 paired controls completed the Attention Network Test, which allow exploring the attentional alterations specifically related to the 3 attentional networks. RESULTS: Alcohol-dependent individuals presented globally delayed reaction times compared to controls. More centrally, they showed a differential deficit across attention networks, with a preserved performance for alerting and orienting networks but impaired executive control (p < 0.001). This deficit was not related to psychopathological comorbidities but was positively correlated with the duration of alcohol-dependence habits, the number of previous detoxification treatments and the mean alcohol consumption before detoxification. CONCLUSIONS: These results suggest that attentional alterations in alcohol dependence are centrally due to a specific alteration of executive control. Intervention programs focusing on executive components of attention should be promoted, and these results support the frontal lobe hypothesis.

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See detailSexual addiction or hypersexual disorder: different terms for the same problem? A review of the literature.
Karila, Laurent; Wery, Aline; Weinstein, Aviv; Cottencin, Olivier; Petit, Aymeric; Reynaud, Michel; Billieux, Joël

in Current pharmaceutical design (2014), 20(25), 4012-20

Sexual addiction, which is also known as hypersexual disorder, has largely been ignored by psychiatrists, even though the condition causes serious psychosocial problems for many people. A lack of empirical evidence on sexual addiction is the result of the disease's complete absence from versions of the Diagnostic and Statistical Manual of Mental Disorders. However, people who were categorized as having a compulsive, impulsive, addictive sexual disorder or a hypersexual disorder reported having obsessive thoughts and behaviors as well as sexual fantasies. Existing prevalence rates of sexual addiction-related disorders range from 3% to 6%. Sexual addiction/ hypersexual disorder is used as an umbrella construct to encompass various types of problematic behaviors, including excessive masturbation, cybersex, pornography use, sexual behavior with consenting adults, telephone sex, strip club visitation, and other behaviors. The adverse consequences of sexual addiction are similar to the consequences of other addictive disorders. Addictive, somatic and psychiatric disorders coexist with sexual addiction. In recent years, research on sexual addiction has proliferated, and screening instruments have increasingly been developed to diagnose or quantify sexual addiction disorders. In our systematic review of the existing measures, 22 questionnaires were identified. As with other behavioral addictions, the appropriate treatment of sexual addiction should combine pharmacological and psychological approaches. Psychiatric and somatic comorbidities that frequently occur with sexual addiction should be integrated into the therapeutic process. Group-based treatments should also be attempted.

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See detailCharacteristics and treatment response of self-identified problematic Internet users in a behavioral addiction outpatient clinic.
Thorens, Gabriel; Achab, Sophia; Billieux, Joël; Khazaal, Yasser; Khan, Riaz; Pivin, Edward; Gupta, Vishal; Zullino, Daniel

in Journal of Behavioral Addictions (2014), 3(1), 78-81

AIMS: Controversies remain about the validity of the diagnosis of problematic Internet use. This might be due in part to the lack of longitudinal naturalistic studies that have followed a cohort of patients who self-identify as having Internet-related problems. METHODS: This retrospective study included 57 patients who consulted the Geneva Addiction Outpatient Clinic from January 1, 2007, to January 1, 2010. Patients underwent an initial clinical psychiatric evaluation that included collection of data on socio-demographics, method of referral, specific Internet usage, psychiatric diagnosis, and Internet Addiction Test (IAT) and Clinical Global Impression Scale (CGI) scores. Treatment consisted of individual psychotherapeutic sessions. RESULTS: Of these patients, 98% were male and 37% were 18 years or younger. Most patients were online gamers (46% playing massively multiplayer online role-playing games). The mean IAT score was 52.9 (range 20-90). Sixty-eight percent of patients had a co-morbid psychiatric diagnosis, with social phobia being the most prevalent (17.8%). Patients who remained in treatment (dropout rate 24%) showed an overall improvement of symptoms: 38.6% showed significant or average improvement on their CGI score, 26.3% showed minimal improvement, and 14% showed no change. CONCLUSIONS: Our results support the hypothesis that there are specific types of Internet use, with online gaming mainly affecting young male patients. As Internet addiction is not yet an official diagnosis, better instruments are needed to screen patients and to avoid false-negative and false-positive diagnoses. Successful care should integrate the treatment of co-morbid symptoms and involve families and relatives in the therapeutic process.

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See detailIs there an all-embracing construct of emotion reactivity? Adaptation and validation of the emotion reactivity scale among a French-speaking community sample.
Lannoy, Severine; Heeren, Alexandre; Rochat, Lucien; Rossignol, Mandy; Van der Linden, Martial; Billieux, Joël

in Comprehensive psychiatry (2014), 55(8), 1960-7

BACKGROUND: Emotion reactivity is defined as the extent to which an individual experiences emotions in response to a wide array of stimuli, intensely, and for a prolonged period. This construct is a key psychological factor in the development and maintenance of psychopathological disorders. The aim of the current study was to develop and validate a French version of the Emotion Reactivity Scale (ERS), which gauges three aspects of emotion reactivity: (1) emotional sensitivity, (2) emotional intensity, and (3) emotional persistence. METHOD: The French ERS and both concurrent and divergent validated scales were administered to 258 participants from the community. RESULTS: Confirmatory factor analyses revealed good fit indices for: (1) a single-factor model, (2) a three-factor model, and (3) a hierarchical three-factor solution with a single-factor solution as a second-order latent variable for a generic construct of emotion reactivity. The French version of the Emotion Reactivity Scale also exhibits acceptable internal scale score reliability (total scale and subscales). Eventually, meaningful relationships were found between factors of emotion reactivity and depression, distinct aspects of impulsive behaviors, and maladaptive emotion regulation strategies. CONCLUSION: Findings of the confirmatory factor analyses are consistent with previous studies suggesting that the ERS is mainly captured by a single major construct of emotion reactivity.

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See detailTrauma exposure interacts with impulsivity in predicting emotion regulation and depressive mood.
Ceschi, Grazia; Billieux, Joël; Hearn, Melissa; Furst, Guillaume; Van der Linden, Martial

in European Journal of Psychotraumatology (2014), 5

BACKGROUND: Traumatic exposure may modulate the expression of impulsive behavioral dispositions and change the implementation of emotion regulation strategies associated with depressive mood. Past studies resulted in only limited comprehension of these relationships, especially because they failed to consider impulsivity as a multifactorial construct. OBJECTIVE: Based on Whiteside and Lynam's multidimensional model that identifies four distinct dispositional facets of impulsive-like behaviors, namely urgency, (lack of) premeditation, (lack of) perseverance, and sensation seeking (UPPS), the current study used a sample of community volunteers to investigate whether an interaction exists between impulsivity facets and lifetime trauma exposure in predicting cognitive emotion regulation and depressive mood. METHODS: Ninety-three adults completed questionnaires measuring lifetime trauma exposure, impulsivity, cognitive emotion regulation, and depressive mood. RESULTS: Results showed that trauma-exposed participants with a strong disposition toward urgency (predisposition to act rashly in intense emotional contexts) tended to use fewer appropriate cognitive emotion regulation strategies than other individuals. Unexpectedly, participants lacking in perseverance (predisposition to have difficulties concentrating on demanding tasks) used more appropriate emotion regulation strategies if they had experienced traumatic events during their life than if they had not. Emotion regulation mediated the path between these two impulsivity facets and depressive mood. CONCLUSIONS: Together, these findings suggest that impulsivity has a differential impact on emotion regulation and depressive mood depending on lifetime exposure to environmental factors, especially traumatic events.

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See detailDoes self-selection affect samples' representativeness in online surveys? An investigation in online video game research.
Khazaal, Yasser; van Singer, Mathias; Chatton, Anne; Achab, Sophia; Zullino, Daniele; Rothen, Stephane; Khan, Riaz; Billieux, Joël; Thorens, Gabriel

in Journal of Medical Internet Research (2014), 16(7), 164

BACKGROUND: The number of medical studies performed through online surveys has increased dramatically in recent years. Despite their numerous advantages (eg, sample size, facilitated access to individuals presenting stigmatizing issues), selection bias may exist in online surveys. However, evidence on the representativeness of self-selected samples in online studies is patchy. OBJECTIVE: Our objective was to explore the representativeness of a self-selected sample of online gamers using online players' virtual characters (avatars). METHODS: All avatars belonged to individuals playing World of Warcraft (WoW), currently the most widely used online game. Avatars' characteristics were defined using various games' scores, reported on the WoW's official website, and two self-selected samples from previous studies were compared with a randomly selected sample of avatars. RESULTS: We used scores linked to 1240 avatars (762 from the self-selected samples and 478 from the random sample). The two self-selected samples of avatars had higher scores on most of the assessed variables (except for guild membership and exploration). Furthermore, some guilds were overrepresented in the self-selected samples. CONCLUSIONS: Our results suggest that more proficient players or players more involved in the game may be more likely to participate in online surveys. Caution is needed in the interpretation of studies based on online surveys that used a self-selection recruitment procedure. Epidemiological evidence on the reduced representativeness of sample of online surveys is warranted.

See detailArticulations clinique-recherche: autour de la psychopathologie et de la psychiatrie
Zech, E.; de Timary, P.; Billieux, Joël; Jacques, H.

Book published by Presses universitaires de Louvain (2013)

Un des objectifs du Centre de recherches en santé et développement psychologique (CSDP) de l'Université catholique de Louvain (UCL) est de promouvoir les échanges et les collaborations entre chercheurs et cliniciens. Cet ouvrage publie les premiers travaux du Centre sur cette thématique. Les six chapitres publiés montrent plusieurs articulations possibles entre les pratiques cliniques et de recherche. Ils amènent à réfléchir sur la nature des potentielles relations entre approches cliniques et démarches de recherche. Nous avons cherché à évaluer comment des hypothèses issues de travaux empiriques peuvent se mettre en place sur le terrain, et inversement, comment les cliniciens à partir de leur pratique peuvent interroger les chercheurs pour mettre en place des projets de recherche. En d’autres termes, il s’agissait de construire des « ponts à double voie » entre la recherche et la pratique clinique, ceux-ci étant synthétisés et discutés en conclusion de l’ouvrage

See detailLa collaboration entre cliniciens et chercheurs : une co-construction
Billieux, Joël; Jacques, H; de Timary, P.; Zech, E.

in Zech, E.; de Timary, P.; Billieux, Joël; Jacques, H. (Eds.) Articulations clinique-recherche: autour de la psychopathologie et de la psychiatrie (2013)

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See detailWhy do you play World of Warcraft? An in-depth exploration of self-reported motivations to play online and in-game behaviours in the virtual world of Azeroth
Billieux, Joël; Van Der Linden, M.; Achab, S.; Khazaal, Y.; Paraskevopoulos, L.; Zullino, D.; Thorens, G.

in Computers in Human Behavior (2013), 29(1), 103-109

Massively multiplayer online role-playing games (MMORPGs) are video games in which players create an avatar that evolves and interacts with other avatars in a persistent virtual world. Motivations to play MMORPGs are heterogeneous (e.g. achievement, socialisation, immersion in virtual worlds). This study investigates in detail the relationships between self-reported motives and actual in-game behaviours. We recruited a sample of 690 World of Warcraft players (the most popular MMORPG) who agreed to have their avatar monitored for 8 months. Participants completed an initial online survey about their motives to play. Their actual in-game behaviours were measured through the game's official database (the Armory website). Results showed specific associations between motives and in-game behaviours. Moreover, longitudinal analyses revealed that teamwork- and competition-oriented motives are the most accurate predictors of fast progression in the game. In addition, although specific associations exist between problematic use and certain motives (e.g. advancement, escapism), longitudinal analyses showed that high involvement in the game is not necessarily associated with a negative impact upon daily living. © 2012 Elsevier Ltd. All rights reserved.

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See detailImplication des biais d’attention sélective dans l’alcoolo-dépendance : une revue conceptuelle et empirique
Deleuze, Jory; Heeren, Alexandre; Billieux, Joël; de Timary, Philippe; Philippot, Pierre; Maurage, Pierre

in Alcoologie et Addictologie (2013), 35(2), 127-135

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See detailEncoding style and its relationships with schizotypal traits and impulsivity during adolescence.
Badoud, Deborah; Billieux, Joël; Van der Linden, Martial; Eliez, Stephan; Debbane, Martin

in Psychiatry research (2013), 210(3), 1020-5

This study intends to explore how individual differences in encoding style (i.e. how encoding is implicitly affected by pre-existing schemata, so called an internal style, versus by cues from the outside world, so called an external style) are associated with schizotypal traits and impulsivity expression during adolescence. Moreover, we aim to provide first evidence reliability for the encoding style questionnaire with an adolescent sample. 101 French-speaking community adolescents (Mage=16.06, S.D.age=2.01; 57 girls; primarily Caucasian) participated in a cross-sectional study. The whole sample filled out a battery of self-report questionnaires. Our data supports a positive association between a predominant internal encoding style, the level of positive and disorganized schizotypal traits, and a higher degree of urgency and sensation seeking impulsivity components. On the one hand, these results have clinical implications in the sense that a low level in implicit processing, namely encoding style, is involved in positive and disorganized schizotypal traits as well as in impulsivity. Schizotypal traits and impulsivity are two sets of traits that put youth at risk for the development of severe psychopathological states in adulthood. On the other hand, this research enables an increased understanding of encoding style by providing the first reliable assessment tool for French-speaking adolescents.

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See detailFactorial structure and psychometric properties of the French adaptation of the Dissociative Experiences Scale (DES) in non-clinical participants
Larøi, F.; Billieux, Joël; Defeldre, A.-C.; Ceschi, G.; Van Der Linden, M.

in European Review of Applied Psychology (2013), 63(4), 203-208

Introduction The Dissociative Experiences Scale (DES) is a widely used instrument for assessing dissociation. However, there is disagreement regarding the internal structure of the DES and scores tend to be highly skewed. Objective The present study was designed to test the psychometric properties of a French version of the DES in non-clinical participants, in addition to applying a response scale as recommended by Wright and Loftus (1999) in order to resolve the problem of skewed scores. Results Exploratory and confirmatory factor analysis (computed in two independent samples) suggested a two-factor solution, which seem to represent two forms of dissociation ("automatic pilot" related dissociation episodes and "defensive" dissociation episodes). Results also revealed high internal consistency, and satisfactory results in terms of skewness and floor effects. Finally, significant associations with other measures (anxiety, depression, traumatic experiences) indicate good concurrent validity. Conclusions This study offers evidence that the present version of the French adaptation of the DES reveals good psychometric properties. Analyses of the internal structure of the DES suggest that two types of dissociative experiences are being measured: automatic pilot-related dissociation episodes (e.g., associated with different types of cognitive failures) and defensive dissociation episodes that may act as defensive mechanisms, especially in persons who have been traumatized (e.g., the avoidance of a memory related to a traumatic event). © 2013 Elsevier Masson SAS.

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See detailA multidimensional approach to impulsivity changes in mild Alzheimer's disease and control participants: cognitive correlates.
Rochat, Lucien; Billieux, Joël; Juillerat Van der Linden, Anne-Claude; Annoni, Jean-Marie; Zekry, Dina; Gold, Gabriel; Van der Linden, Martial

in Cortex: A Journal Devoted to the Study of the Nervous System and Behavior (2013), 49(1), 90-100

INTRODUCTION: Impulsive behaviors are frequently described in brain-damaged patients, including patients with Alzheimer's disease (AD). However, few studies have examined impulsivity changes and associated cognitive impairments in AD and healthy controls. Consequently, the first aim of this study was to compare patients with mild AD and matched controls on four dimensions of impulsivity (urgency, lack of premeditation, lack of perseverance, and sensation seeking) recently highlighted in the literature. The second objective was to examine the association between impulsivity changes and cognitive performances on executive/attentional tasks in mild AD and healthy controls. METHODS: Thirty patients with mild AD and 30 matched controls were administered a battery of tests that assessed executive and attention processes. In addition, informants of each patient and control completed a short questionnaire designed to assess the changes on the four dimensions of impulsivity (Rochat et al., 2008). RESULTS: Patients with mild AD had higher scores than controls on lack of premeditation and lack of perseverance dimensions of impulsivity, whereas the two groups did not differ on urgency and sensation seeking. Furthermore, patients showed significant decreased performances on measures of inhibition of prepotent responses, set-shifting, and working memory, as well as higher variability of reaction times (RTs) than matched controls. Regression analyses computed on the whole sample emphasized that difficulties in inhibition of prepotent responses significantly predicted higher lack of premeditation, and larger variability of RTs and set-shifting difficulties significantly predicted higher lack of perseverance, even when global cognitive functioning, general processing speed, working memory, and age were controlled for. Urgency and sensation seeking were not associated with any variables. CONCLUSIONS: These results provide valuable insight into the nature of brain systems and cognitive processes underlying impulsive behaviors. In addition, they open up interesting prospects for better comprehension of behavioral and psychological symptoms of AD.

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See detailImpulsivité et psychopathologie: une approche transdiagnostique
Billieux, Joël

in Revue Francophone de Clinique Comportementale et Cognitive (2012), 17(3), 42-65

L’impulsivité, généralement considérée comme la tendance à exprimer des comportements spontanés, excessifs et/ou non planifiés, joue un rôle essentiel dans la compréhension de nombreux états psychopathologiques et comportements problématiques. Elle constitue d’ailleurs le critère diagnostique le plus fréquemment mentionné dans le Manuel Diagnostique et Statistique des Troubles Mentaux (DSM). Dans cet article, nous montrons en quoi l’impulsivité constitue un processus « transdiagnostique » impliqué dans le développement et le maintien d’une large gamme de troubles émotionnels. Pour ce faire, et en partant d’un modèle dominant (modèle UPPS de l’impulsivité, Whiteside & Lynam, 2001), nous exposerons en quoi l’impulsivité est un construit multidimensionnel sous-tendu par une pluralité de mécanismes cognitifs, affectifs, et motivationnels. Nous décrirons ensuite les données démontrant que les différentes facettes de l’impulsivité (et les mécanismes associés) prédisent une variété de symptômes psychopathologiques habituellement associés à des diagnostics psychiatriques distincts. Finalement, nous discuterons l’apport d’une telle conception en termes d’évaluation et d’intervention psychologique à travers la présentation d’un cas clinique.

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See detailProblematic use of the mobile phone: A literature review and a pathways model
Billieux, Joël

in Current Psychiatry Reviews (2012), 8(4), 299-307

Despite its unambiguous advantages, cellular phone use has been associated with harmful or potentially disturbing behaviors. Problematic use of the mobile phone is considered as an inability to regulate one's use of the mobile phone, which eventually involves negative consequences in daily life (e.g., financial problems). The current article describes what can be considered dysfunctional use of the mobile phone and emphasizes its multifactorial nature. Validated assessment instruments to measure problematic use of the mobile phone are described. The available literature on risk factors for dysfunctional mobile phone use is then reviewed, and a pathways model that integrates the existing literature is proposed. Finally, the assumption is made that dysfunctional use of the mobile phone is part of a spectrum of cyber addictions that encompasses a variety of dysfunctional behaviors and implies involvement in specific online activities (e.g., video games, gambling, social networks, sex-related websites). © 2012 Bentham Science Publishers.

See detailJeu problématique et impulsivité: une approche multidimensionnelle
Billieux, Joël; Belkacem, Abdou

in Grall-Bronnec, M. (Ed.) Le jeu pathologique: Comprendre, prévenir, traiter (2012)

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See detailProblematic use of the Internet and self-regulation: a review of the initial studies
Billieux, Joël; Van der Linden, Martial

in The Open Addiction Journal (2012), 5

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See detailThe Geneva Smoking Pictures: development and preliminary validation.
Khazaal, Yasser; Zullino, Daniele; Billieux, Joël

in European addiction research (2012), 18(3), 103-9

Cue reactivity is essential to the maintenance of addictive disorders. A useful way to study cue reactivity is by means of normative pictures, but few validated tobacco-related pictures are available. This study describes a database of smoking-related pictures: The Geneva Smoking Pictures (GSP). Sixty smoking-related pictures were presented to 91 participants who assessed them according to the classic emotional pictures validation provided by the International Affective Picture System (NIMH Center for the Study of Emotion and Attention, 2002). The pictures were rated according to three dimensions: (1) valence (from positive to negative), (2) emotional arousal (from high arousing to low arousing), and (3) dominance (from submissive to dominant). Participants were also screened with the Fagerstrom Test for Nicotine Dependence. Normative ratings for valence, arousal and dominance of the pictures are provided for the whole sample, as well as separately for dependent (n = 46) and nondependent smokers (n = 45). Arousal and dominance were associated with greater nicotine dependence, but valence ratings were not. The GSP is a normative database providing a large number of stimuli for investigators who are conducting nicotine and tobacco research.

See detailFacettes cognitives de l’impulsivité et optimisme explicite : quels rôles dans les conduites de jeu d’argent ?
Aufrère, Laurence; Billieux, Joël; Van der Linden, Martial

in Vénisse, J.-L. (Ed.) Les addictions sans drogue : prévenir et traiter. Un défi sociétal (2012)

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See detailDifficulties in disengaging attentional resources from self-generated thoughts moderate the link between dysphoria and maladaptive self-referential thinking.
Rochat, Lucien; Billieux, Joël; Van der Linden, Martial

in Cognition and Emotion (2012), 26(4), 748-57

Negative emotions increase self-focused attention, a core feature of depression and anxiety-related disorders. However, the cognitive mechanisms associated with the tendency to self-focus-and, conversely, with the ability to voluntarily disengage attentional resources from the self and direct them towards the external environment-remain poorly understood. Thus, this study aimed to examine whether a specific cognitive control mechanism that directs attention between self-generated thoughts and external information might moderate the relationship between dysphoria and maladaptive self-referential thinking. Results showed that dysphoria increases the frequency of rumination, self-blame, and catastrophising, especially for participants who have more difficulty in switching from self-generated thoughts to information provided by the environment. These results shed new light on the cognitive mechanisms underlying maladaptive self-referential thinking associated with dysphoria. More specifically, this specific cognitive mechanism might play a key role in the maintenance or amplification of a depressed mood.

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See detailValidation of a short Spanish version of the UPPS-P impulsive behaviour scale
Cándido, A.; Orduña, E.; Perales, J. C.; Verdejo-García, A.; Billieux, Joël

in Trastornos Adictivos (2012), 14(3), 73-78

Aim: Impulsivity is a multifaceted construct that has a prominent role in psychiatry and especially in addiction. The objective of the current study is to develop and validate a Spanish version of the short UPPS-P impulsive behavior scale1, which assesses five distinct impulsivity traits (positive urgency, negative urgency, lack of premeditation, lack of perseverance, and sensation seeking). Material and methods: One hundred and eighty-nine participants were included in the study. Confirmatory factor analyses supported the five-factor model of the original scale. Results: The results indicated good internal reliability. External validity was supported by specific relationships with a scale assessing emotion regulation strategies. Conclusion: Accordingly, the short Spanish version of the UPPS-P scale presents good psychometric properties and may be considered a promising instrument for both research and clinical practice. © 2012 Elsevier España, S.L. © 2012 Elsevier España.

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See detailFrench validation of the compulsive internet use scale (CIUS).
Khazaal, Yasser; Chatton, Anne; Horn, Alessandra; Achab, Sophia; Thorens, Gabriel; Zullino, Daniele; Billieux, Joël

in The Psychiatric quarterly (2012), 83(4), 397-405

The popularity of using the Internet and related applications has grown in European countries in the last two decades. Despite numerous advantages in terms of optimizing communications among individuals and social systems, the use of the Internet may be associated with excessive use and possible Internet addiction. The goals of the current study were to validate a French version of the compulsive Internet use scale (CIUS) and to assess its links with common psychiatric symptoms such as depression (assessed with the Beck depression inventory: BDI), anxiety (assessed with the trait anxiety inventory: STAI) and alcohol misuse (assessed with the alcohol use disorder identification test: AUDIT). The French versions of the CIUS, BDI, STAI and AUDIT were administered to a sample of Internet users. Exploratory and confirmatory analyses, correlation analysis and logistic regression were performed. As previously found with the original version, a one-factor model of the CIUS had good psychometric properties and fit the data well. Excessive use of the Internet was associated with depressive symptoms.

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See detailAssociations among metacognitive beliefs, anxiety and positive schizotypy during adolescence.
Debbane, Martin; Van der Linden, Martial; Balanzin, Dario; Billieux, Joël; Eliez, Stephan

in The Journal of nervous and mental disease (2012), 200(7), 620-6

The expression of early delusion and hallucination-like symptoms, known as positive schizotypy (PS), holds predictive power for later development of psychotic disorders. However, little is known about the psychological and emotional processes promoting the expression of PS during adolescent development. Our study's objective was to examine the nature of the relationships between adolescent PS and two dimensions previously identified to contribute to adult positive symptoms of psychosis, metacognitive beliefs and anxiety. Using a structural equation modeling design, data from self-report questionnaires measuring anxiety, metacognitive beliefs, and PS were collected from 179 adolescents aged 12 to 19 years. Our results indicate that although metacognitive beliefs significantly influence adolescent PS and anxiety, maladaptive contradictory metacognitive beliefs specifically potentiate positive schizotypal expression in hallucination-prone adolescents. Furthermore, we observe that PS and anxiety entertain reciprocal relationships. These findings suggest that relationships between metacognitive beliefs, anxiety, and PS can already be observed during adolescence.

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See detailTrait gambling cognitions predict near-miss experiences and persistence in laboratory slot machine gambling.
Billieux, Joël; Van der Linden, Martial; Khazaal, Yasser; Zullino, Daniele; Clark, Luke

in British Journal of Psychology (2012), 103(3), 412-27

'Near-miss' outcomes (i.e., unsuccessful outcomes close to the jackpot) have been shown to promote gambling persistence. Although there have been recent advances in understanding the neurobiological responses to gambling near-misses, the psychological mechanisms involved in these events remain unclear. The goal of this study was to explore whether trait-related gambling cognitions (e.g., beliefs that certain skills or rituals may help to win in games of chance) influence behavioural and subjective responses during laboratory gambling. Eighty-four individuals, who gambled at least monthly, performed a simplified slot machine task that delivered win, near-miss, and full-miss outcomes across 30 mandatory trials followed by a persistence phase in extinction. Participants completed the Gambling-Related Cognitions Scale (GRCS; Raylu & Oei, 2004), as well as measures of disordered gambling (South Oaks Gambling Screen [SOGS]; Lesieur & Blume, 1987) and social desirability bias (DS-36; Tournois, Mesnil, & Kop, 2000). Skill-oriented gambling cognitions (illusion of control, fostered by internal factors such as reappraisal of losses, or perceived outcome sequences), but not ritual-oriented gambling cognitions (illusion of control fostered by external factors such as luck or superstitions), predicted higher subjective ratings of desire to play after near-miss outcomes. In contrast, perceived lack of self-control predicted persistence on the slot machine task. These data indicate that the motivational impact of near-miss outcomes is related to specific gambling cognitions pertaining to skill acquisition, supporting the idea that gambling near-misses foster the illusion of control.

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See detailInvestigation of impulsivity in a sample of treatment-seeking pathological gamblers: a multidimensional perspective.
Billieux, Joël; Lagrange, Guillaume; Van der Linden, Martial; Lancon, Christophe; Adida, Marc; Jeanningros, Regine

in Psychiatry research (2012), 198(2), 291-6

Numerous studies have shown that problem gambling is characterised by lack of impulse control. However, they have often been conducted without considering the multifaceted nature of impulsivity and related psychological mechanisms. The current study aims to disentangle which impulsivity facets are altered in pathological gambling. Twenty treatment-seeking pathological gamblers (PGs) and 20 matched control participants completed a self-reported questionnaire measuring the various facets of impulsive behaviours (UPPS Impulsive Behaviour Scale), as well as two laboratory tasks assessing inhibitory control (the go-stop task) and tolerance for delayed rewards (single key impulsivity paradigm). Compared with matched controls, PGs exhibited higher urgency, lower premeditation, impairment in prepotent inhibition, and lower tolerance towards delayed rewards. Nevertheless, complementary profile analyses showed that impulsivity-related deficits found in PGs are highly heterogeneous, and that some PGs are neither impulsive in the impulsivity facets assessed nor impaired in the cognitive mechanisms measured. These findings underscore (1) the necessity to disentangle the construct of impulsivity into lower-order components and (2) that further studies should take into account, in addition to impulsivity-related mechanisms, other psychological factors potentially involved in pathological gambling.

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See detailQu’est-ce que la psychothérapie empiriquement fondée ?
Billieux, Joël; Blairy, Sylvie; Boulanger, Marie; Brouette, B.; Clauw, L; De Mol, J.; Deplus, S.; Laroi, F; Nef; Philippot, P; Sarto, D.

in Revue Francophone de Clinique Comportementale et Cognitive (2012), 17(4), 5-7

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See detailEffects of expertise on football betting.
Khazaal, Yasser; Chatton, Anne; Billieux, Joël; Bizzini, Lucio; Monney, Gregoire; Fresard, Emmanuelle; Thorens, Gabriel; Bondolfi, Guido; El-Guebaly, Nady; Zullino, Daniele; Khan, Riaz

in Substance abuse treatment, prevention, and policy (2012), 7

BACKGROUND: Football (soccer) is one of the most popular sports in the world, including Europe. It is associated with important betting activities. A common belief, widely spread among those who participate in gambling activities, is that knowledge and expertise on football lead to better prediction skills for match outcomes. If unfounded, however, this belief should be considered as a form of "illusion of control." The aim of this study was to examine whether football experts are better than nonexperts at predicting football match scores. METHODS: Two hundred and fifty-eight persons took part in the study: 21.3% as football experts, 54.3% as laypersons (non-initiated to football), and 24.4% as football amateurs. They predicted the scores of the first 10 matches of the 2008 UEFA European Football Championship. Logistic regressions were carried out to assess the link between the accuracy of the forecasted scores and the expertise of the participants (expert, amateur, layperson), controlling for age and gender. RESULTS: The variables assessed did not predict the accuracy of scoring prognosis (R2 ranged from 1% to 6%). CONCLUSIONS: Expertise, age, and gender did not appear to have an impact on the accuracy of the football match prognoses. Therefore, the belief that football expertise improves betting skills is no more than a cognitive distortion called the "illusion of control." Gamblers may benefit from psychological interventions that target the illusion of control related to their believed links between betting skills and football expertise. Public health policies may need to consider the phenomenon in order to prevent problem gambling related to football betting.

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See detailValidation of a short French version of the UPPS-P Impulsive Behavior Scale.
Billieux, Joël; Rochat, Lucien; Ceschi, Grazia; Carre, Arnaud; Offerlin-Meyer, Isabelle; Defeldre, Anne-Catherine; Khazaal, Yasser; Besche-Richard, Chrystel; Van der Linden, Martial

in Comprehensive psychiatry (2012), 53(5), 609-15

BACKGROUND: Impulsivity is a multifaceted construct that has a prominent role in psychiatry. Lynam et al (2006) have developed the UPPS-P, a 59-item scale measuring 5 impulsivity components: negative urgency, positive urgency, lack of premeditation, lack of perseverance, and sensation seeking. The aim of the present study was to validate a short, 20-item French version of the UPPS-P. METHODS: Six hundred fifty participants filled out the short French UPPS-P. A subgroup of participants (n = 145) took part in a follow-up study and completed the scale twice to determine test-retest stability; another subgroup (n = 105) was screened with other questionnaires also to establish external validity. RESULTS: Confirmatory factor analyses supported a hierarchical model comprising 2 higher order factors of urgency (resulting from negative urgency and positive urgency) and lack of conscientiousness (resulting from lack of premeditation and lack of perseverance) as well as a separate factor of sensation seeking. The results indicated good internal consistency and test-retest stability. External validity was supported by relationships with psychopathological symptoms. CONCLUSION: The short French version of the UPPS-P therefore presents good psychometric properties and may be considered a promising instrument for both research and clinical practice.

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See detailLa contribution de la psychopathologie cognitive à l’intervention psychologique
Van der Linden, Martial; Billieux, Joël

in Monzée, Joel (Ed.) Ce que le cerveau a dans la tête : Perception, apparences et personnalité (tome 2) (2011)

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See detailLifetime exposure to adverse events and reinforcement sensitivity in obsessive-compulsive prone individuals
Ceschi, G.; Hearn, M.; Billieux, Joël; Van der Linden, M.

in Behaviour Change (2011), 28(2), 75-86

A diathesis-stress perspective of obsessive-compulsive symptoms (OCS) predicts that exposure to adverse events and personality dispositions jointly influence OCS. Gray and McNaughton's (2000) model of personality posits that, faced with challenging circumstances, individuals with a high sensitivity to punishment (SP) will be more prone to OCS because they cannot avoid the downward spiral into anxiety. The current study investigates OCS severity in relation to lifetime exposure to adverse events (AE), SP, and sensitivity to reward (SR) in 122 nonclinical adults. The results indicate that OCS severity is predicted by AE, SP and SR. Interestingly, the impact of adverse experiences is moderated by SR and not SP. These findings suggest that: (1) exposure to adverse events and SP are independent OCS risk factors, and (2) exposure to adverse events is more critical for reward dependent people. This is discussed in light of responsibility and 'not just right experiences' in OCS, along with the role of impulsivity in the obsessivecompulsive disorder spectrum.

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See detailArabic validation of the Compulsive Internet Use Scale (CIUS).
Khazaal, Yasser; Chatton, Anne; Atwi, Khodor; Zullino, Daniele; Khan, Riaz; Billieux, Joël

in Substance abuse treatment, prevention, and policy (2011), 6

BACKGROUND: The popularity of using the Internet and related applications has grown in Arabic countries in recent years. Despite numerous advantages in terms of optimizing communications among individuals and social systems, the use of the Internet may in certain cases become problematic and engender negative consequences in daily life. As no instrument in the Arabic language is available, however, to measure excessive Internet use, the goal of the current study was to validate an Arabic version of the Compulsive Internet Use Scale (CIUS). METHODS: The Arabic version of the CIUS was administered to a sample of 185 Internet users and exploratory and confirmatory analyses performed. RESULTS: As found previously for the original version, a one-factor model of the CIUS had good psychometric properties and fit the data well. The total score on the CIUS was positively associated with time spent online. CONCLUSION: The Arabic version of the CIUS seems to be a valid self-report to measure problematic Internet use.

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See detailPsychological predictors of problematic involvement in massively multiplayer online role-playing games: illustration in a sample of male cybercafe players.
Billieux, Joël; Chanal, Julien; Khazaal, Yasser; Rochat, Lucien; Gay, Philippe; Zullino, Daniele; Van der Linden, Martial

in Psychopathology (2011), 44(3), 165-71

BACKGROUND: Massively Multiplayer Online Role-Playing Games (MMORPGs) are video games in which a large number of players interact with one another in a persistent virtual world. MMORPGs can become problematic and result in negative outcomes in daily living (e.g. loss of control on gaming behaviors, compromised social and individual quality of life). The aim of the present study is to investigate psychological predictors of problematic involvement in MMORPGs. SAMPLING AND METHODS: Fifty-four males who played MMORPGs regularly were recruited in cybercafes and screened using the UPPS Impulsive Behavior Scale (which assesses 4 facets of impulsivity) and the Motivation to Play Online Questionnaire (which assesses personal motives to play online). Negative consequences due to excessive time spent on the Internet were assessed with the Internet Addiction Test. RESULTS: Multiple regression analysis showed that problematic use of MMORPGs is significantly predicted by: (1) high urgency (b = 0.45), and (2) a motivation to play for immersion (b = 0.35). CONCLUSION: This study showed that, for certain individuals (who are characterized by a proneness to act rashly in emotional contexts and motivated to play to be immersed in a virtual world), involvement in MMORPGs can become problematic and engender tangible negative consequences in daily life.

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See detailHow impulsivity relates to compulsive buying and the burden perceived by caregivers after moderate-to-severe traumatic brain injury.
Rochat, Lucien; Beni, Catia; Billieux, Joël; Annoni, Jean-Marie; Van der Linden, Martial

in Psychopathology (2011), 44(3), 158-64

BACKGROUND: Impulsivity is a core feature in patients with traumatic brain injury (TBI). The aim of the study is to investigate how a specific dimension of impulsivity, namely urgency (the tendency to act rashly when distressed), might shed new light on the aetiology of compulsive buying proneness in patients with TBI and to explore how urgency and compulsive buying relate to the burden perceived by the caregivers. SAMPLING AND METHODS: Caregivers of 74 patients with TBI were given 3 questionnaires in order to assess their subjective burden as well as patients' impulsivity and compulsive buying proneness. RESULTS: Both urgency and compulsive buying tendencies significantly increased after TBI. Furthermore, path analyses revealed that current urgency was both directly and indirectly related to the subjective burden perceived by the caregivers, and this indirect pathway was mediated by compulsive buying. CONCLUSION: Urgency plays a central role in understanding specific problematic behaviours after TBI and their impact on caregivers. These findings are discussed in light of the cognitive processes underlying the urgency component of impulsivity in relation to the occurrence of compulsive buying behaviours after TBI.

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See detailMotivations to play specifically predict excessive involvement in massively multiplayer online role-playing games: evidence from an online survey.
Zanetta Dauriat, Francesca; Zermatten, Ariane; Billieux, Joël; Thorens, Gabriel; Bondolfi, Guido; Zullino, Daniele; Khazaal, Yasser

in European addiction research (2011), 17(4), 185-9

BACKGROUND: Several studies have linked massively multiplayer online role-playing games (MMORPGs) with possible problematic usage or internet addiction. AIMS: The main goal of the present study was to assess links between motivations to play in MMORPGs and addictive involvement in such types of games. METHODS: A total of 696 gamers responded to an online survey. RESULTS AND CONCLUSION: Five distinct motivations to play were identified in gamers: achievement, socializing, immersion, relaxing and escaping. Multiple regression analysis revealed that addictive MMORPG use patterns are predicted by achievement, escapism and socializing motives. Gender was also a significant predictor of problematic involvement in MMORPGs. Moreover, addictive MMORPG use positively correlated with the weekly time devoted to playing MMORPGs.

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See detailThe potential interest of topiramate in addictions
Thorens, G.; Billieux, Joël; Manghi, R.; Khan, R.; Khazaal, Y.; Zullino, D. F.

in Current Pharmaceutical Design (2011), 17(14), 1410-1415

Topiramate is one of the currently most promising compounds in the field of addiction medicine. This paper discusses its potential utility related to a phase model of addiction development, focusing on the assumption that addiction is a continuous process involving different neurobiological pathways, depending on the stage of addiction. A specific emphasis will be made on the development of dysfunctional automatic behaviors in the late stage of addiction and the central role of glutamate and AMPA receptors. The aim is to propose that if too broad an effect of anti-addiction medication is expected (such as anti-craving, anti-relapse and preventive effects), the results might be disappointing. The speculative specific efficacy of topiramate in addiction is described. ©2011 Bentham Science Publishers Ltd.

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See detailThe Geneva Appetitive Alcohol Pictures (GAAP): development and preliminary validation.
Billieux, Joël; Khazaal, Yasser; Oliveira, Sandrine; de Timary, Philippe; Edel, Yves; Zebouni, Fadi; Zullino, Daniele; Van der Linden, Martial

in European addiction research (2011), 17(5), 225-30

This study describes a new database of alcohol-related pictures: The Geneva Appetitive Alcohol Pictures (GAAP). 60 alcohol-related pictures (beverages, drinking-related behaviors, alcohol-related cues) were presented to 101 participants (ranging from social drinkers to problem drinkers), who assessed them according to the classic emotional pictures validation provided by the International Affective Picture System (Center for the Study of Emotion and Attention (CSEA[-]NIMH), 2002). Participants were also screened with the Alcohol Use Disorders Identification Test. Normative ratings for valence, arousal and dominance of the pictures are provided separately for problem/risky users (n = 49) and non-risky drinkers (n = 52). The GAAP is a normative database that provides a large number of stimuli for investigators who conduct research on alcohol.

See detailLes mécanismes psychologiques impliqués dans le jeu problématique/pathologique
Van der Linden, Martial; Billieux, Joël

in Dunand, C.; Rihs-Middel, M.; Simon, O. (Eds.) Prévenir le jeu excessif dans une société addictive : D’une approche bio-psycho-sociale à la définition d’une politique de santé publique (2010)

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See detailAddictions et mécanismes d'autorégulation : Pour une approche multifactorielle et dynamique
Billieux, Joël; Van Der Linden, M.

in Psychotropes (2010), 16(1), 45-56

Self regulation has traditionally been a central concept in many theoretical models of addictive behaviors, whether related to substance use or not. Although numerous studies have established a clear relationship between low self-regulation (lack of impulse control) and addictive behaviours, few have been based on a specific theoretical rational which considers the multifaceted nature of selfregulation and its related psychological mechanisms. The present article emphasizes the necessity to propose an integrative approach taking into account the specific contribution of the various facets of impulsivity in addictive behaviours. We also discuss the limitations of conceptualizing addictive behaviours by focusing solely on individual differences in self-regulation abilities.

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See detailThe role of urgency and its underlying psychological mechanisms in problematic behaviours.
Billieux, Joël; Gay, Philippe; Rochat, Lucien; Van der Linden, Martial

in Behaviour research and therapy (2010), 48(11), 1085-96

The urgency facet of impulsivity, that is, the tendency to act rashly in response to intense emotional contexts [Cyders, M. A., & Smith, G. T. (2008). Emotion-based dispositions to rash action: positive and negative urgency. Psychological Bulletin, 134, 807-828], has been related to a wide range of maladaptive behaviours. The present study further investigates the role of urgency in problematic behaviours by considering distinct psychological mechanisms that may underlie this component of impulsivity. With this aim, 95 volunteer participants were screened with self-reported questionnaires assessing urgency and three problematic behaviours (compulsive buying, excessive mobile phone use, excessive Internet use). They performed two laboratory tasks: a stop-signal task designed to assess the capacity to inhibit prepotent responses in response to both neutral and emotional stimuli; and the Iowa Gambling Task (IGT) measuring the ability to take into account the future consequences of an action. A poor ability to inhibit prepotent responses in the emotional condition of the stop-signal task was found to predict more disadvantageous choices in the IGT, which ultimately results in higher urgency and more problematic behaviours. These findings shed new light on the construct of urgency, its related psychological mechanisms, and its role in problematic behaviours.

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See detailLack of inhibitory control predicts cigarette smoking dependence: evidence from a non-deprived sample of light to moderate smokers.
Billieux, Joël; Gay, Philippe; Rochat, Lucien; Khazaal, Yasser; Zullino, Daniele; Van der Linden, Martial

in Drug and alcohol dependence (2010), 112(1-2), 164-7

OBJECTIVE: To examine the relationship between prepotent inhibition capacities and cigarette dependence in a sample of non-deprived light to moderate smokers. METHODS: Fifty volunteer smokers were screened with a laboratory go-stop paradigm, and self-reports of cigarette dependence (Fagerstrom Test for Nicotine Dependence, FTND) and cigarette craving (revised Questionnaire on Smoking Urge, QSU-12). RESULTS: Correlation and regression analyses showed that lower prepotent inhibition capacities predict higher levels of cigarette dependence when individual differences in processing speed, craving states, and age were controlled for. In addition, lower inhibition capacity is associated with a higher number of cigarettes smoked per day. CONCLUSIONS: A poor ability to inhibit prepotent responses seems to be one of the individual factors related to cigarette smoking dependence.

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See detailAssessment of impulsivity after moderate to severe traumatic brain injury.
Rochat, Lucien; Beni, Catia; Billieux, Joël; Azouvi, Philippe; Annoni, Jean-Marie; Van der Linden, Martial

in Neuropsychological Rehabilitation (2010), 20(5), 778-97

The aim of the study was to develop and validate a short questionnaire assessing four dimensions of impulsivity (urgency, lack of premeditation, lack of perseverance, sensation seeking) in patients with traumatic brain injury (TBI). To this end, 82 patients with TBI and their caregivers completed a short questionnaire adapted from the UPPS Impulsive Behavior Scale designed to assess impulsivity changes after TBI. Confirmatory factor analyses (CFAs) performed on the version of the scale completed by the relatives revealed that a hierarchical model holding that lack of premeditation and lack of perseverance are facets of a higher order construct (lack of conscientiousness), with urgency and sensation seeking as separate correlated factors, fit the data best. Urgency, lack of premeditation, and lack of perseverance increased after the TBI, whereas sensation seeking decreased. CFA failed to reveal a satisfactory model in the version of the scale completed by the patients. The psychological processes related to these impulsivity changes and the discrepancy observed between self-report and informant-report are discussed. This short questionnaire opens up interesting prospects for better comprehension and assessment of behavioural symptoms of TBI.

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See detailA measure of dysfunctional eating-related cognitions in people with psychotic disorders.
Khazaal, Yasser; Billieux, Joël; Fresard, Emmanuelle; Huguelet, Philippe; Van der Linden, Martial; Zullino, Daniele

in The Psychiatric quarterly (2010), 81(1), 49-56

Obesity and binge eating disorder are common in individuals with psychotic disorders. Eating and weight-related cognitions are known to influence eating behaviors. The study was designed to assess the psychometric properties of the Mizes Anorectic Cognitions Questionnaire (MAC-R) in patients with psychotic disorders. Binge eating disorder (BED), body mass index (BMI), the MAC-R and the three factor eating questionnaire (TFEQ) were assessed in 125 patients with a diagnosis of schizophrenia or schizoaffective disorder. Whereas the MAC-R has not acceptable psychometric properties, a brief version of the MAC-R (BMAC) has good psychometrical properties and is correlated with TFEQ and BMI. Binge eating disorder is also correlated to the Rigid Weight Regulation and Fear of Weight Gain subscale. The BMAC is a useful brief measure to assess eating and weight related cognitions in people with psychotic disorders.

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See detailCan the distinction between intentional and unintentional interference control help differentiate varieties of impulsivity?
Gay, Philippe; Courvoisier, D. S.; Billieux, Joël; Rochat, Lucien; Schmidt, Ralph Erich; Van der Linden, Martial

in Journal of Research in Personality (2010), 44(1), 46-52

It has recently been shown that perseverance specifically relates to resisting proactive interference [Gay, P., Rochat, L., Billieux, J., d'Acremont, M., & Van der Linden, M. (2008). Heterogeneous inhibition processes involved in different facets of self-reported impulsivity: Evidence from a community sample. Acta Psychologica, 129, 332-339]. The aim of this study was to replicate and extend this finding by investigating the relationships between unintentional control of interference (in a recent-negatives task), intentional control of interference (in a directed-forgetting task), and the four facets of impulsivity. The performance of 71 volunteers indicated that the relevant variables of the two tasks shared very little or no variance. In particular, regression analyses showed that lower perseverance (i.e., higher impulsivity on this facet) predicted more interference-related errors in both tasks and less time dedicated to resolving proactive interference; however, lower perseverance did not predict directed-forgetting cost. Higher urgency predicted higher interference time due to response-conflict. © 2009 Elsevier Inc.

See detailImpulsivity
Van der Linden, Martial; Billieux, Joël

in Sander, D.; Scherer, K.R. (Eds.) The Oxford Companion to Affective Sciences. An encyclopaedic dictionary for the Affective Sciences (2009)

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See detailA French adaptation of the internal and external encoding style questionnaire and its relationships with impulsivity
Billieux, Joël; D'Argembeau, A.; Lewicki, P.; Van der Linden, M.

in European Review of Applied Psychology (2009), 59(1), 3-8

Recent research has revealed the existence of individual differences in how preexisting schemata (versus cues from the outside world) affect encoding processes, which can be reliably assessed with the internal and external encoding style questionnaire (ESQ) [Lewicki, P. Internal and External Encoding Style and Social Motivation. In: J. P. Forgas, K. D. Williams, S. M. Laham, (Eds.), Social Motivation: Conscious and Unconscious Processes. Psychology Press, New York (2005). pp. 194-209]. The present study was designed to (1) test the psychometric properties of a French version of the ESQ and (2) explore in-depth its relationship with impulsivity - a trait of central importance in the understanding of emotional psychopathology, and which has been previously related to the internal encoding style. Sixty-three participants were tested using the French versions of the ESQ and the UPPS impulsive behavior scale. The UPPS identifies four distinct facets of impulsivity: urgency, lack of premeditation, lack of perseverance, and sensation seeking. The results showed (1) that the French version of the ESQ has good psychometric properties and (2) that consistent with theoretical considerations, internal encoding style is related to two specific out of the four components of impulsivity: high urgency and low perseverance. © 2008 Elsevier Masson SAS. All rights reserved.

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See detailBrief DISCERN, six questions for the evaluation of evidence-based content of health-related websites.
Khazaal, Yasser; Chatton, Anne; Cochand, Sophie; Coquard, Olivier; Fernandez, Sebastien; Khan, Riaz; Billieux, Joël; Zullino, Daniele

in Patient Education and Counseling (2009), 77(1), 33-7

OBJECTIVE: To extract and to validate a brief version of the DISCERN which could identify mental health-related websites with good content quality. METHOD: The present study is based on the analysis of data issued from six previous studies which used DISCERN and a standardized tool for the evaluation of content quality (evidence-based health information) of 388 mental health-related websites. After extracting the Brief DISCERN, several psychometric properties (content validity through a Factor analysis, internal consistency by the Cronbach's alpha index, predictive validity through the diagnostic tests, concurrent validity by the strength of association between the Brief DISCERN and the original DISCERN scores) were investigated to ascertain its general applicability. RESULTS: A Brief DISCERN composed of two factors and six items was extracted from the original 16 items version of the DISCERN. Cronbach's alpha coefficients were more than acceptable for the complete questionnaire (alpha=0.74) and for the two distinct domains: treatments information (alpha=0.87) and reliability (alpha=0.83). Sensibility and specificity of the Brief DISCERN cut-off score > or =16 in the detection of good content quality websites were 0.357 and 0.945, respectively. Its predictive positive and negative values were 0.98 and 0.83, respectively. A statistically significant linear correlation was found between the total scores of the Brief DISCERN and those of the original DISCERN (r=0.84 and p<0.0005). CONCLUSION: The Brief DISCERN seems to be a reliable and valid instrument able to discriminate between websites with good and poor content quality. PRACTICE IMPLICATIONS: The Brief DISCERN is a simple tool which could facilitate the identification of good information on the web by patients and general consumers.

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See detailSwiss psychiatrists' beliefs and attitudes about internet addiction.
Thorens, Gabriel; Khazaal, Yasser; Billieux, Joël; Van der Linden, Martial; Zullino, Daniele

in The Psychiatric quarterly (2009), 80(2), 117-23

AIMS: To investigate the beliefs and attitudes of Swiss general psychiatrists toward Internet addiction. METHODS: Ninety-fourth Swiss psychiatrists filled out a questionnaire at a conference of general psychiatry assessing their views on the concept of Internet addiction, their evaluation methods and treatment procedures they use. RESULTS: A cluster analysis revealed three groups: DISBELIEVERS (N = 20) rejected the concept of Internet addiction and its importance, not considering it a real clinical problem and consequently not considering the existence of a specific treatment. The NOSOLOGY BELIEVERS (N = 66) and NOSOLOGY/TREATMENT BELIEVERS (N = 8) assumed that Internet addiction is a real problem. While NOSOLOGY/TREATMENT BELIEVERS asserted the availability of effective treatment (mainly psychological), NOSOLOGY BELIEVERS were less affirmative regarding treatment. CONCLUSION: Thought the concept of Internet addiction is largely acknowledged as a clinical reality by Swiss psychiatrists, routine screening and treatment remain uncommon, mainly due to the belief that efficient treatment is still lacking.

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See detailMindful Attention Awareness Scale (MAAS): Psychometric properties of the French translation and exploration of its relations with emotion regulation strategies.
Jermann, Francoise; Billieux, Joël; Laroi, Frank; d'Argembeau, Arnaud; Bondolfi, Guido; Zermatten, Ariane; Van der Linden, Martial

in Psychological assessment (2009), 21(4), 506-14

Over the past few years, several questionnaires have been developed to measure mindfulness. The Mindful Attention Awareness Scale (MAAS) was created to specifically capture attention and awareness in daily life (Brown & Ryan, 2003). In this article, we present a French adaptation of the MAAS. In the 1st study, we explored the psychometric properties of this adaptation. In the 2nd study, we investigated its relation to cognitive emotion regulation and depressive symptomatology using path analysis. As in the original version of the MAAS, the French adaptation has a strong 1-factor structure. Moreover, there was a negative relationship between the MAAS and the severity of depressive symptoms, both directly and indirectly. The indirect pathway was mediated by the nonadaptive cognitive emotion regulation strategy of self-blame and the adaptive cognitive emotion regulation strategy of positive reappraisal. In conclusion, this questionnaire represents a valid mindfulness measure for French-speaking clinicians and researchers.

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See detailImpaired inhibition of proactive interference in abstinent individuals with alcoholism.
Noel, Xavier; Billieux, Joël; Van der Linden, Martial; Dan, Bernard; Hanak, Catherine; de Bournonville, Stephanie; Baurain, Celine; Verbanck, Paul

in Journal of clinical and experimental neuropsychology (2009), 31(1), 57-64

Cognitive impairment has been associated with higher risk of alcoholism and relapse. Recent theoretical refinements have separated inhibition of dominant response and inhibition of proactive interference. We assessed the latter using a directed-forgetting procedure in 38 recently detoxified individuals with alcoholism and in 26 controls. On this task, memory performance of letter trigrams was compared when presented alone, followed by a second trigram to be recalled, then a second trigram to be forgotten (directed-forgetting condition). Individuals with alcoholism recalled more letters to be forgotten and performed worse than controls in the directed-forgetting condition, which significantly correlated with the duration of alcoholism.

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See detailImpulsivité et dépendances : une approche cognitive et motivationnelle à la lumière du modèle UPPS de Whiteside et Lynam
Billieux, Joël; Van der Linden, Martial

in Revue Francophone de Clinique Comportementale et Cognitive (2008), 13(3), 12-24

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See detailThe role of impulsivity in actual and problematic use of the mobile phone
Billieux, Joël; Van Der Linden, M.; Rochat, L.

in Applied Cognitive Psychology (2008), 22(9), 1195-1210

Several authors have investigated the risks arising from the growth in mobile phone use (e.g. debts incurred by young people). The aims of the present study are (1) to validate a new questionnaire assessing problematic mobile phone use: the Problematic Mobile Phone Use Questionnaire (PMPUQ), and (2) to investigate the relationships between the PMPUQ and the multi-faceted construct of impulsivity. With these aims, 339 subjects were screened using the PMPUQ and the UPPS Impulsive Behaviour Scale (UPPS) which assesses four distinct components associated with impulsive behaviours (urgency, lack of premeditation, lack of perseverance and sensation seeking). The results showed that the PMPUQ has an acceptable fit and assesses four different dimensions of problematic mobile phone use (prohibited use, dangerous use, dependence, financial problems). While each facet of impulsivity played a specific role in mobile phones use, urgency appeared to be the strongest predictor of problematic use. Copyright © 2008 John Wiley & Sons, Ltd.

See detailUne approche cognitive, affective et motivationnelle de l’impulsivité
Billieux, Joël; Rochat, Lucien; Van der Linden, Martial

in Van der Linden, Martial; Ceschi, Grazia (Eds.) Traité de psychopathologie cognitive : bases théoriques (tome 1) (2008)

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See detailDepressive symptoms after trauma: is self-esteem a mediating factor?
David, Melissa; Ceschi, Grazia; Billieux, Joël; Van der Linden, Martial

in The Journal of nervous and mental disease (2008), 196(10), 735-42

Traumatic events have predicted depressive symptoms. Despite this consensus, it remains unclear as to whether the relationship between trauma and depression is consistently mediated by a negative cognitive schema, such as low self-esteem, or whether trauma influences mood independently of low self-esteem. This study tested these relationships while considering depressive symptom types. One hundred thirty-two students reported the number of traumatic events experienced and self-esteem and depression levels. Results indicated 2 depressive symptom types: "cognitive-affective" and "somatic." Structural Equation Modeling tested an unmediated path from trauma to depressive symptoms and a path mediated by self-esteem. Results supported the unmediated relationship between trauma and "cognitive-affective" depressive symptoms, and did not support mediation by self-esteem. Findings are discussed in view of a dimensional rather than categorical approach to depression, and in consideration of alternative symptom clusters resulting from trauma in addition to those captured by posttraumatic stress disorder.

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See detailA French adaptation of a short version of the Sensitivity to Punishment and Sensitivity to Reward Questionnaire (SPSRQ)
Lardi, C.; Billieux, Joël; d'Acremont, M.; Linden, M. V. D

in Personality and Individual Differences (2008), 45(8), 722-725

According to Gray's Reinforcement Sensitivity Theory (RST; Gray, 1982), personality results from the interaction of three major systems: a Behavioural Activation System (BAS), a Behavioural Inhibition System (BIS) and a Fight/Flight System (FFS). Based on this model, Torrubia, Avila, Molto, and Caseras (2001) developed an instrument, the Sensitivity to Punishment and Sensitivity to Reward Questionnaire (SPSRQ), which assesses the two major systems that explain individual differences in sensitivity and reactions to punishing and rewarding stimuli. In the present study, we have proposed a short version of the SPSRQ, based on O'Connor, Colder, and Hawk's (2004) findings. To this end, 360 participants were screened using the French translation of a short version of the SPSRQ. Confirmatory factor analysis showed that a two-factor model has acceptable fit. Moreover, the results indicated that there was very good internal reliability for both the sensitivity to reward and sensitivity to punishment scales. © 2008 Elsevier Ltd. All rights reserved.

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See detailHeterogeneous inhibition processes involved in different facets of self-reported impulsivity: evidence from a community sample.
Gay, Philippe; Rochat, Lucien; Billieux, Joël; d'Acremont, Mathieu; Van der Linden, Martial

in Acta psychologica (2008), 129(3), 332-9

Whiteside and Lynam (Whiteside, S. P., & Lynam, D. R. (2001). The Five Factor Model and impulsivity: Using a structural model of personality to understand impulsivity. Personality and Individual Differences, 30, 669-689) clarified the multifaceted nature of impulsivity by identifying four distinct facets of self-reported impulsive behaviors: urgency, (lack of) premeditation, (lack of) perseverance, and sensation seeking. Building on work by Bechara and Van der Linden (Bechara, A., & Van der Linden, M. (2005). Decision-making and impulse control after frontal lobe injuries. Current Opinion in Neurology, 18, 734-739), the main objective of this study was to investigate the hypothesis that perseverance and urgency map onto the two distinct inhibitory functions distinguished by Friedman and Miyake (Friedman, N. P., & Miyake, A. (2004). The relations among inhibition and interference control functions: A latent-variable analysis. Journal of Experimental Psychology: General, 133, 101-135): prepotent response inhibition and resistance to proactive interference. Participants (N=126) completed the UPPS Impulsive Behavior Scale and three tasks: a recent-negatives task to assess proactive interference in working memory, and two Go/No-Go tasks at different paces, the slower of which also assessed task-unrelated thoughts (TUTs). Consistent with the hypothesis, TUTs were positively correlated with lack of perseverance, and multiple regressions revealed that urgency was specifically related to errors in prepotent response inhibition, and lack of perseverance to errors due to difficulties overcoming proactive interference.

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See detailAre all facets of impulsivity related to self-reported compulsive buying behavior?
Billieux, Joël; Rochat, L.; Rebetez, M. M. L.; Van der Linden, M.

in Personality and Individual Differences (2008), 44(6), 1432-1442

Compulsive buying is defined as uncontrolled and excessive purchases leading to personal and family distress. While compulsive buying is generally considered to be an impulse control disorder, very few studies have explored its relationships with the multidimensional construct of impulsivity. Consequently, the aim of the present study is to investigate the role of the various components of impulsivity in compulsive buying. To this end, 150 volunteer participants from the community were screened using a questionnaire assessing compulsive buying, and the French version of the UPPS Impulsive Behavior Scale. This scale identifies four distinct components associated with impulsive behaviors: urgency, lack of premeditation, lack of perseverance, and sensation seeking. The results showed that (1) compulsive buying is positively correlated with three facets of impulsivity (urgency, lack of perseverance and lack of premeditation), and (2) multiple linear regression analysis revealed urgency to be the only significant predictor of compulsive buying tendencies when gender, age, educational level and depression were controlled for. Those findings are discussed in light of the psychological processes underlying the various components of impulsivity in relation to the occurrence of compulsive buying behaviors. © 2007 Elsevier Ltd. All rights reserved.

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See detailAssessing impulsivity changes in Alzheimer disease.
Rochat, Lucien; Delbeuck, Xavier; Billieux, Joël; d'Acremont, Mathieu; Van der Linden, Anne-Claude Juillerat; Van der Linden, Martial

in Alzheimer disease and associated disorders (2008), 22(3), 278-83

Impulsive behaviors are common in brain-damaged patients including those with neurodegenerative diseases such as Alzheimer disease (AD). The objective of this study was to develop and validate a short version of the UPPS Impulsive Behavior Scale assessing changes on 4 different dimensions of impulsivity, namely urgency, (lack of) premeditation, (lack of) perseverance, and sensation seeking, arising in the course of a neurodegenerative disease. To this end, caregivers of 83 probable AD patients completed a short questionnaire adapted from the UPPS Impulsive Behavior Scale. Exploratory and confirmatory factor analyses of the data were performed and revealed that a model with 4 distinct but related latent variables corresponding to 4 different dimensions of impulsivity fit the data best. Furthermore, the results showed that lack of perseverance, followed by lack of premeditation and urgency, increased after the onset of the disease, whereas sensation seeking decreased. Overall, the multifaceted nature of impulsivity was confirmed in a sample of AD patients, whose caregivers reported significant changes regarding each facet of impulsivity. Consequently, the short version of the UPPS Impulsive Behavior Scale opens up interesting prospects for a better comprehension of behavioral symptoms of dementia.

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See detailFrench validation of the internet addiction test.
Khazaal, Yasser; Billieux, Joël; Thorens, Gabriel; Khan, Riaz; Louati, Youssr; Scarlatti, Elisa; Theintz, Florence; Lederrey, Jerome; Van Der Linden, Martial; Zullino, Daniele

in Cyberpsychology and Behavior: the Impact of the Internet, Multimedia and Virtual Reality on Behavior and Society (2008), 11(6), 703-6

The main goal of the present study is to investigate the psychometric properties of a French version of the Internet Addiction Test (IAT) and to assess its relationship with both time spent on Internet and online gaming. The French version of the Young's Internet Addiction Test (IAT) was administered to a sample of 246 adults. Exploratory and confirmatory analyses were carried out. We discovered that a one-factor model of the IAT has good psychometric properties and fits the data well, which is not the case of a six-factor model as found in previous studies using exploratory methods. Correlation analysis revealed positive significant relationships between IAT scores and both the daily duration of Internet use and the fact of being an online player. In addition, younger people scored higher on the IAT. The one-factor model found in this study has to be replicated in other IAT language versions.

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See detailWhich dimensions of impulsivity are related to cigarette craving?
Billieux, Joël; Van der Linden, Martial; Ceschi, Grazia

in Addictive behaviors (2007), 32(6), 1189-99

Cigarette smoking is a very important health problem and represents the largest preventable risk factor for premature death in developed countries. A considerable body of research indicates that impulsivity is a central etiological concept in many theoretical models of tobacco addiction. The aim of this study is to analyse which dimensions of impulsivity are related to cigarette craving. To this end, 40 undergraduate psychology students were screened using the revised Questionnaire on Smoking Urges (QSU-12) and the French adaptation of the UPPS Impulsive Behavior Scale (UPPS). This scale identifies four distinct components associated with impulsive behaviour: urgency, lack of premeditation, lack of perseverance, and sensation seeking. The results showed that urgency is a significant predictor of tobacco cravings, while depression and anxiety are not.

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See detailDoes impulsivity relate to perceived dependence on and actual use of the mobile phone?
Billieux, Joël; Van der Linden, M.; D'Acremont, M.; Ceschi, G.; Zermatten, A.

in Applied Cognitive Psychology (2007), 21(4), 527-537

Several authors have studied the risks arising from the growth in mobile phone use (e.g. large debts incurred by young people, banned or dangerous use of cellular phones). The aim of this study is to analyse whether impulsivity, which has often been related to various forms of addictive behaviours, is associated with massive use of and dependence on the mobile phone. In this study, 108 female undergraduate psychology students were screened using a questionnaire evaluating actual use of and perceived dependence on the mobile phone, and with the French adaptation of the UPPS Impulsive Behavior Scale. This scale identifies four distinct components associated with impulsive behaviour: Urgency, lack of Premeditation, lack of Perseverance, and Sensation Seeking. The results showed that a relationship can be established between the use of and perceived dependence on the cellular phone and two facets of impulsivity: Urgency and lack of Perseverance. Copyright © 2006 John Wiley & Sons, Ltd.

See detailTroubles du comportement socio-émotionnel et impulsivité: une approche cognitive et neuropsychologique
Van der Linden, Martial; Rochat, Lucien; Billieux, Joël

in Azouvy, P.; Mazaux, J.-M.; Pradat-Diehl, P. (Eds.) Comportement et lésions cérébrales - actes des 19e entretiens de la fondation Garches (2006)