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See detailDo the mental number line and spatial sequence synesthesia share neural substrates? A patterned TMS study.
Bien, Nina; Van der Horst, Anne; Sack, Alexander et al

Poster (2012, May)

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See detailFirst Zenith Total Delay and Integrated Water Vapour Estimates from the Near Real-Time GNSS Data Processing Systems at the University of Luxembourg
Ahmed, Furqan UL; Teferle, Felix Norman UL; Bingley, Richard

Poster (2012, March 16)

Since June 2011, the University of Luxembourg has started in collaboration with the University of Nottingham a PhD project entitled “The Potential of Precipitable Water Vapour Measurements using Global ... [more ▼]

Since June 2011, the University of Luxembourg has started in collaboration with the University of Nottingham a PhD project entitled “The Potential of Precipitable Water Vapour Measurements using Global Navigation Satellite Systems in Luxembourg (PWVLUX)”, which is funded by the Fonds National de la Recherche (FNR) Luxembourg. The research objectives of the project are to study the potential for improvements in short-term weather forecasts and long-term climate variability for Luxembourg and the Greater Region by inclusion of the observations from Global Navigation Satellite Systems (GNSS) in the existing techniques. To achieve the research objectives, systems are being set up at the University of Luxembourg which process ground-based GNSS data for the provision of zenith total delay (ZTD) and integrated water vapour (IWV) estimates in real-time, near real-time and post-processing modes. Through collaboration with the Administration du cadastre et de la topographie (Luxembourg) and the Service public de Wallonie (Belgium), the coverage of the available GNSS permanent networks is improved over the primary project area, although also data from other European and global networks are processed. The meteorological analysis of the PWVLUX products is supported through collaborations with the Meteorological Service of the Administration de la navigation aérienne and the EUMETNET project E-GVAP. In this study we present the first ZTD and IWV estimates obtained from the near-real time processing systems in development at the University of Luxembourg. In a preliminary evaluation we compared their performance to some state-of-the-art systems already in operation and found that the ZTD estimates agree up to a few millimeters and the IWV estimates agree at the sub-millimeter level. [less ▲]

Detailed reference viewed: 67 (1 UL)
See detailBody mapping of thermal sensitivity to cold at rest and during exercise
Ouzzahra, Yacine UL; Havenith, George

Poster (2012, March)

Detailed reference viewed: 57 (0 UL)
Peer Reviewed
See detailDesign of a model predictive controller for welding robot under impact loading
Rappel, Hussein UL; Haeri Yazdi, Mohmmad Reza

Poster (2012, February 23)

Detailed reference viewed: 50 (2 UL)
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See detailShifts of spatial attention cued by irrelevant numbers: Electrophysiological evidence from a target discrimination task
Schuller, Anne-Marie UL; Hoffmann, Danielle UL; Schiltz, Christine UL

Poster (2012, February 10)

Fischer et al. demonstrated that a centrally presented number can shift attention to the left/right when its magnitude is small/large. Two electrophysiological studies described these attentional effects ... [more ▼]

Fischer et al. demonstrated that a centrally presented number can shift attention to the left/right when its magnitude is small/large. Two electrophysiological studies described these attentional effects as event-related potentials (ERPs) at centro-parietal sites. Since both studies used target detection tasks, it remains currently unknown whether similar results would be obtained with a discrimination task. We used ERPs to test whether digit cues also induce attention shifts when participants perform a feature-discrimination task on targets. ERPs were recorded whereas subjects discriminated the colour of lateral targets that were preceded by a central non-predictive digit. Analysis of cue-locked controlateral vs. ipsilateral ERP activity showed the emergence of early preparatory attention-directing components in parietal and frontal regions. Moreover, target-locked P1 components at occipito-parietal sites were significantly modulated by digit magnitude-target side congruency. These results demonstrate that irrelevant digit cues also bias sensory processing when embedded in a feature-discrimination task. [less ▲]

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See detailThe effect of number syntax on two-digit magnitude judgments in German-French bilinguals.
Van Rinsveld, Amandine UL; Ugen, Sonja UL; Schiltz, Christine UL et al

Poster (2012, February)

The study examined the effect of language and presentation mode on numerical processing skills in German-French bilinguals. This bilingual combination is particularly interesting because the order of two ... [more ▼]

The study examined the effect of language and presentation mode on numerical processing skills in German-French bilinguals. This bilingual combination is particularly interesting because the order of two digit number words is inversed in both languages: decade-unit in French but unit-decade in German. Further, previous studies used written number word presentations as verbal notation to activate language, which are, however, rarely used in everyday life. The present study therefore tackled the question whether two-digit magnitude judgments are affected by the presentation mode (visual Arabic vs. auditory words) and the language (German vs. French)? Data stem from adult participants (mean age: 25,3 years) who were proficient German-French bilinguals. The within-subject design involved two-digit number pair comparisons presented visually and auditory in German and in French. In line with previous studies, participants responded faster and more accurately on compatible than on incompatible trials in the visual Arabic presentation mode in both languages (compatibility effect): In compatible number pairs, the decades and units concord to the same magnitude decision (e.g. 23_57; decade: 2<5 and unit:3<7) whereas decade and units discord (47_82; decade: 4<8 but 7>2) for incompatible number pairs. In the auditory mode, the results showed a tendency for a regular compatibility effect in German and an inverse compatibility effect in French with participants responding faster on incompatible trials suggesting that bilinguals process numerical tasks in the language of presentation similar to monolinguals using the same language. Conclusively, the results imply differential numerical processing according to the presentation mode (visual Arabic vs. auditory words) and the language (German vs. French). [less ▲]

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See detailMachine learning techniques for atmospheric pollutant monitoring
Sainlez, Matthieu UL; Heyen, Georges

Poster (2012, January 27)

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See detailLow stress weekends promote adaptation to stressful weeks: The design principles of the biological response to stress
Yilmaz, Nilgun; Kolodkin, Alexey UL; Plant, Nick et al

Poster (2012)

Robustness is a fundamental and essential property of evolvable biological systems. It provides system to conserve its functionalities against internal/external perturbations and uncertainties. Product ... [more ▼]

Robustness is a fundamental and essential property of evolvable biological systems. It provides system to conserve its functionalities against internal/external perturbations and uncertainties. Product inhibition, feed-forward and feed-back inhibition and stimulation, and regulatory loops within signal transduction networks are a few of the approaches generated by biological systems to maintain both their robustness and adaptability. In this study, we are able to show the interaction of the stress hormone cortisol with its two nuclear receptors, the high affinity glucocorticoid receptor (GR) and the low affinity pregnane X-receptor (PXR) by using a mathematical model based on realistic kinetic parameters. We checked the importance of regulatory loops, within this network, in terms of pharmacodynamic and pharmacokinetic responses. Then, we demonstrate the alterations in the system response with respect to variable cortisol perturbations, such as initial single peak in cortisol, and repeated stimuli of cortisol with differing frequencies and time frames. As a conclusion, we reveal that the network is robust towards low frequency perturbations, shows adaptation at moderate stress frequencies, but transitions to an altered steady state at high frequency stimulation, which we believe is a predisposing factor towards stress-induced pathologies. [less ▲]

Detailed reference viewed: 134 (9 UL)
See detailA Biomolecular Isolation Framework for Molecular Eco-Systems Biology
Muller, Emilie UL; Roume, Hugo UL; Shah, Pranjul UL et al

Poster (2012)

With the advent of high-throughput omic technologies, powerful and sensitive methods are available for the analysis of nucleic acid, protein and small molecule complements obtained from biological samples ... [more ▼]

With the advent of high-throughput omic technologies, powerful and sensitive methods are available for the analysis of nucleic acid, protein and small molecule complements obtained from biological samples. Molecular eco-systems biology studies based on the integration of genomic, transcriptomic, proteomic and metabolomic data are faced with major challenges arising from the complexity, dynamics and heterogeneity of mixed microbial consortia. In order to facilitate meaningful data integration, analysis and modeling, it is essential that biomolecular fractions obtained for high-throughput omic analyses are representative of single unique samples. We have developed a new methodological framework for the reproducible isolation of high-quality genomic DNA, large and small RNA, proteins, and polar and non-polar metabolites from single unique mixed microbial community samples. The methodology is based around reproducible cryogenic sample preservation and cell lysis. Metabolites are extracted first using organic solvents, followed by the sequential isolation of nucleic acids and proteins using chromatographic spin column technology. The methodology was validated by comparison to traditional dedicated and simultaneous biomolecular isolation methods. To prove the broad applicability of the methodology, we applied it to microbial consortia of biotechnological, environmental and medical interest. Importantly, the developed methodology will allow exploitation of the inherent heterogeneity and dynamics within microbial consortia through spatial and temporal sampling of biological systems to allow later deconvolution of community-wide, population-wide and individual-level processes using the generated omic data. This approach has the potential to identify associations between distinct biomolecules and which may provide pointers towards unravelling previously unknown metabolic processes. Finally, by providing a standardized workflow, the methodology lays the foundation for comparative eco-systematic studies of different natural microbial consortia in the future. [less ▲]

Detailed reference viewed: 92 (2 UL)
See detailA biomolecular isolation protocol for Eco-Systems Biology: How to isolate DNA, RNA, proteins and metabolites from a single unique sample
Roume, Hugo UL; Muller, Emilie UL; Shah, Pranjul UL et al

Poster (2012)

The Molecular Systems Biology approach based on the integration of omic datasets is hampered by the complexity, dynamic and heterogeneity of mixed microbial communities. In order to facilitate meaningful ... [more ▼]

The Molecular Systems Biology approach based on the integration of omic datasets is hampered by the complexity, dynamic and heterogeneity of mixed microbial communities. In order to facilitate meaningful data integration, individual biomolecular fractions need to be obtained from single unique samples. Our newly developed methodology allows for the isolation of high-quality genomic DNA, RNA, proteins and metabolites from single mixed microbial community samples (e.g. human faeces, freshwater filtrate), as well as from mammalian tissues. The framework lays the basis for standardized molecular (eco-)systematic studies on a range of different biological samples in the future. [less ▲]

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See detailA developmental investigation of the SNARC effect using a colour discrimination task.
Hoffmann, Danielle UL; Hornung, Caroline UL; Mussolin, Christophe et al

Poster (2012)

How do number-space interactions develop from childhood to adulthood? The SNARC effect (Spatial Numerical Association of Response Codes) reflects the finding that participants respond faster to small ... [more ▼]

How do number-space interactions develop from childhood to adulthood? The SNARC effect (Spatial Numerical Association of Response Codes) reflects the finding that participants respond faster to small numbers with their left hand and to large numbers with their right hand during a number classification task. Typically assessed through magnitude-independent parity judgment tasks, the SNARC effect is thought to show the automaticity of the number-space link. Using a parity task on children Berch et al. (1999) found a SNARC effect no earlier than from 9.2 years onwards. However, we hypothesise that parity judgments might be inappropriate to assess younger children. Therefore a more age-appropriate colour judgment task (implicit) and a magnitude judgement task (explicit) were designed and tested on 363 children from kindergarten to Grade 6 (5.8-12 years). The experimental tasks were complemented by a brief assessment of arithmetic skills. The results revealed overall significant SNARC effects [colour task t(355)=2.6, p<0.01; magnitude task t(340)=4.7, p<0.001], which interacted with grade [colour task F(6,355)=2.18; p<0.05; magnitude task F(6,340)=2.09; p=0.05]. Most interestingly, even the kindergartners already display both effects [colour task t(28)=1.96; p<0.05; magnitude task t(24)=1.7; p=0.05]. These results show explicit and implicit access to numerical magnitude in children as young as 5.8 years. [less ▲]

Detailed reference viewed: 67 (6 UL)
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See detailMobility and safety of elderly drivers and pedestrians: review of interventions and training programmes
Tournier, Isabelle UL; Dommes, Aurélie; Cavallo, Viola

Poster (2012)

Detailed reference viewed: 28 (5 UL)
See detailCommodities Inventory Effect
Carpantier, Jean-Francois UL

Poster (2012)

Detailed reference viewed: 12 (0 UL)
See detailEffect of viruses on bacterial community structure and single-cell carbon and nitrogen assimilation
Sheik, Abdul UL; Corina; Phyllis, Lam et al

Poster (2012)

Detailed reference viewed: 52 (7 UL)
See detailEssstörungen im Kindesalter: Die Vermeidend/Restriktive Essstörung im Selbstbericht
Bellwald, Laura; Van Dyck, Zoé UL; Dremmel, Daniela et al

Poster (2012)

Detailed reference viewed: 185 (0 UL)
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See detailAnalysis of critical transitions in Parkinson's disease
Trefois, Christophe UL; Antony, Paul UL; Baumuratov, Aidos UL et al

Poster (2011, December 12)

Background Parkinson’s disease is the most common neurodegenerative movement disorder and is clinically characterized by resting tremor, bradykinesia and cogwheel rigidity. The disease affects 1-2% of the ... [more ▼]

Background Parkinson’s disease is the most common neurodegenerative movement disorder and is clinically characterized by resting tremor, bradykinesia and cogwheel rigidity. The disease affects 1-2% of the global population with prevalence in the people above 65 years of age. The main pathological hallmark of Parkinson’s disease is a progressive loss of dopaminergic neurons in the substantia nigra. Therefore, one important challenge is to improve the understanding of regime shifts between health and disease states. Improving predictions of critical transitions triggering the onset of parkinsonian phenotypes could contribute to the improvement of preventive treatments. Methods Based on cellular models, we will use the mathematical concept of critical transitions to create a toolbox for potentially predicting tipping points towards cellular Parkinson’s disease phenotypes, e.g. mitochondrial dysfunction. Experimentally, we will induce and analyze potential critical transitions in the SH-SY5Y cell line. To do this, we will apply Parkinson’s disease relevant chemical and genetic perturbations and analyze multiple scales of the resulting temporal system behavior. We will combine high content imaging with genetic and biochemical data. A significant informatics challenge arises from the aim to perform the analysis of high time-resolved 3D imaging data. We are therefore developing an automated image analysis pipeline that relies on latest technologies and techniques, such as 3D deconvolution and 3D particle tracking. This pipeline will be applied to study parameters, such as mitochondrial dynamics, which include for instance velocity, morphology, and spatial organization. [less ▲]

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See detailStructural properties of poly(N-isopropyl acrylamide)-based systems
Philipp, Martine UL; Magerl, D.; Aleksandrova, Ralitsa UL et al

Poster (2011, October 10)

Detailed reference viewed: 44 (3 UL)
See detailEco-Systems Biology of Natural Lipid-Accumulating Microbial Communities
Muller, Emilie UL; Roume, Hugo; Lebrun, Laura UL et al

Poster (2011, September 27)

Biological wastewater treatment represents arguably the most widely used biotechnological process on Earth. Due to its high organic load, wastewater represents a potentially interesting energy commodity ... [more ▼]

Biological wastewater treatment represents arguably the most widely used biotechnological process on Earth. Due to its high organic load, wastewater represents a potentially interesting energy commodity that is currently not exploited comprehensively. Molecules of particular interest for sustainable bioenergy production are lipids which represent up to 45 % of the organic fraction of wastewater. Within biological wastewater treatment plants, specific lipid accumulating organism (LAO) communities exhibit specialized phenotypes that might be harnessed for the concomitant treatment of wastewater and the production of biodiesel (long chain fatty acid (LCFA) methyl esters). Furthermore, due to the unusual high-density enrichments in the LAO communities, these represent ideal models for the development of relevant high-resolution ecosystems biology methodologies. The main aims are: determining the exact genetic inventories required for excess lipid uptake, storage and processing within lipid accumulating bacterial populations ; determining the metabolic fate of organic molecules (lipids) within LAO communities ; and determining the functional organisation in relation to genetic heterogeneity of lipid accumulating bacterial populations. [less ▲]

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See detailHeterogenous Nucleation in Hard Spheres Systems
Dorosz, Sven UL

Poster (2011, September)

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See detailValidity of a Single-Item Scale for Life Satisfaction
Klein, M. C.; Kovaleva, A.; Beierlein, C. et al

Poster (2011, August)

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See detailHeterogenous Nucleation in Hard Spheres Systems
Dorosz, Sven UL

Poster (2011, August)

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See detailScrambling horizontal face structure: behavioral and electrophysiogical evidence for a tuning of visual face processing to horizontal information
Goffaux, Valerie; Schiltz, Christine UL; Jacques, Corentin

Poster (2011, August)

Filtering faces to remove all but the horizontal information largely preserves behavioral signatures of face-specific processing, including the face inversion effect (FIE). Conversely, preserving only ... [more ▼]

Filtering faces to remove all but the horizontal information largely preserves behavioral signatures of face-specific processing, including the face inversion effect (FIE). Conversely, preserving only vertical information abolishes this effect. In contrast to previous studies which used filtering, the present studies manipulated orientation content of face images by randomizing Fourier phase spectrum in a narrow horizontal orientation band (H-randomization) or vertical orientation band (V-randomization). Phase-randomization was performed on face images in which spatial frequency amplitude spectrum (SF-AS) was either left unaltered or equalized across all SF orientations. We further investigated the time course of horizontal tuning using event-related potentials (ERP). We observed that (i) upright faces were best discriminated when the horizontal structure was preserved (ie V-randomization) compared to H-randomization; (ii) this phase-randomization effect was eliminated by inversion, resulting in (iii) a smaller FIE for H-randomized than V-randomized faces. This pattern was still present but was less consistent when SF-AS was equalized across SF orientations, suggesting that SF-AS in horizontal orientation contributes to the horizontal tuning of face perception. ERP evidence of horizontal tuning for upright face processing was observed in the N170 time-window, a well-known face-sensitive electrophysiological component. The N170 was delayed for H-randomized compared to V-randomized faces. Additionally, and in line with behavioural data, face inversion increased N170 latency to a smaller extent for H-randomized compared to V-randomized. Altogether, our findings indicate that horizontal tuning is a robust property of face perception that arises early in high-level visual cortex. [less ▲]

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See detailCandidate mutations for early-onset lung cancer by family genome sequencing
Simeonidis, Vangelis UL; Roach, Jared; Brunkow, Mary et al

Poster (2011, July)

Early-onset lung cancer has been studied as a rare, but distinct, sub-type of lung cancer. Genome-wide association studies (GWAS) have linked several genes with this form of malignancy. We sequenced the ... [more ▼]

Early-onset lung cancer has been studied as a rare, but distinct, sub-type of lung cancer. Genome-wide association studies (GWAS) have linked several genes with this form of malignancy. We sequenced the genomes of a family quartet in which one of the offspring was diagnosed with early-onset lung cancer at about 48 years of age. The family has a history of heavy smoking and the father had in the past been diagnosed with head and neck cancer. The DNA source was blood, which leads us to concentrate our analysis on Mendelian inheritance models. To make the inheritance pattern explicit, we establish the parental origin of the offspring’s genomes through phasing of their chromosomes. This helps identify whether mutations in the proband came from the father or the mother. More than 18 million sequence variants were initially identified in the proband through comparison to the hg19 reference genome. We reduce this list to fewer than 200 potentially functional variants (e.g. single nucleotide variations and short indels) present in the genomes of the proband and at least one parent, by applying a series of filters. We refine the list of candidate mutations further by comparison to gene candidates from GWAS studies and genes that are mutated in lung cancer tissue as recorded by The Cancer Genome Atlas. The results of our analysis are discussed and conclusions about possible causative mutations for early-onset lung cancer are drawn. [less ▲]

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See detailCareer “choice” and parental images. A clinical case Study
Rioux, Alain; Pignault, Anne UL

Poster (2011, July)

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See detailChasing the flux: selecting target pathways through flux analysis of carbon metabolism
Simeonidis, Vangelis UL; Murabito, Ettore; Smallbone, Kieran et al

Poster (2011, June 26)

One of the goals of Systems Biology is to develop and utilise high-throughput methods for the measurement of parameters and concentrations on a genome-wide scale, while at the same time generating ... [more ▼]

One of the goals of Systems Biology is to develop and utilise high-throughput methods for the measurement of parameters and concentrations on a genome-wide scale, while at the same time generating predictive models for system behaviour. In studying genome-scale metabolic networks, the task of exhaustively assaying and measuring all reaction components can be daunting, because hundreds or even thousands of enzymes (activities and concentrations) need to be considered for the construction of a full-scale, detailed model. There is a clear need for strategies that allow us to systematically select the subsets of pathways and reactions which should be prioritized when studying metabolism. We present a methodology for selecting those reactions that carry the overwhelming majority of the carbon flux through the metabolic network. The recent community-driven reconstruction of the metabolic network of baker’s yeast [1] provides the basis for our analysis. Flux Balance Analysis provides a theoretical flux distribution. Results are constrained with GC-MS exometabolomic measurements of the carbon flux. Flux calculations can also be improved by using 13C measurements to determine intracellular metabolic fluxes. The solution of the constrained FBA problem gives us a ranked list of reactions, based on the amount of carbon flux through each reaction. We improve the specificity of the method further by performing an Elementary Flux Mode analysis, which provides us with target pathways consisting of the reactions that carry the most carbon flux. Our methodology allows us to cover more than 95% of the carbon flux by studying but a small subset of the reactions of the genome-scale metabolic network of baker’s yeast. [less ▲]

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See detailStructural properties of poly(N-isopropyl acrylamide)-based systems
Philipp, Martine UL; Magerl, D.; Aleksandrova, Ralitsa UL et al

Poster (2011, June 08)

Detailed reference viewed: 32 (3 UL)
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See detailStructural properties of poly(N-isopropyl acrylamide)-based systems
Philipp, Martine UL; Magerl, D.; Aleksandrova, Ralitsa UL et al

Poster (2011, June 01)

Detailed reference viewed: 49 (3 UL)
Peer Reviewed
See detailInteractions between number and space processing in adults with dyscalculia
Mussolin, Christophe; Schiltz, Christine UL

Poster (2011, May 27)

A large body of evidence indicates clear relationships between number and space processing in healthy and brain-damaged adults, as well as in children. The present paper addressed this issue regarding ... [more ▼]

A large body of evidence indicates clear relationships between number and space processing in healthy and brain-damaged adults, as well as in children. The present paper addressed this issue regarding atypical math development. Adults with a diagnosis of dyscalculia (DYS) during childhood were compared to adults with average or high abilities in mathematics across two bisection tasks. Participants were presented with Arabic number triplets and had to judge either the number magnitude or the spatial location of the middle number relative to the two outer numbers. For the numerical judgment, adults with DYS were slower than both groups of control peers. They were also more strongly affected by the factors related to number magnitude such as the range of the triplets or the distance between the middle number and the real arithmetical mean. By contrast, adults with DYS were as accurate and fast as adults who never experienced math disability when they had to make a spatial judgment. Moreover, number-space congruency affected performance similarly in the three experimental groups. These findings support the hypothesis of a deficit of number magnitude representation in DYS with a relative preservation of some spatial mechanisms in DYS. Results are discussed in terms of direct and indirect number-space interactions. [less ▲]

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See detailContribution of Spatial Frequency and Orientation to upright and inverted face perception
Goffaux, Valerie; Van Zon, Jaap; Hestermann, Dietmar et al

Poster (2011, May)

It was recently shown that expert face perception relies on the extraction of horizontally oriented visual cues. Picture-plane inversion was found to eliminate horizontal, suggesting that this tuning ... [more ▼]

It was recently shown that expert face perception relies on the extraction of horizontally oriented visual cues. Picture-plane inversion was found to eliminate horizontal, suggesting that this tuning contributes to the specificity of face processing. The present experiments sought to determine the spatial frequency (SF) scales supporting the horizontal tuning of face perception. Participants were instructed to match upright and inverted faces that were filtered both in the frequency and orientation domains. Faces in a pair contained horizontal or vertical ranges of information in low, middle, or high SF (LSF, MSF, or HSF). Our findings confirm that upright (but not inverted) face perception is tuned to horizontal orientation. Horizontal tuning was the most robust in the MSF range, next in the HSF range, and absent in the LSF range. Moreover, face inversion selectively disrupted the ability to process horizontal information in MSF and HSF ranges. This finding was replicated even when task difficulty was equated across orientation and SF at upright orientation. Our findings suggest that upright face perception is tuned to horizontally oriented face information carried by intermediate and high SF bands. They further indicate that inversion alters the sampling of face information both in the orientation and SF domains. [less ▲]

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See detailScrambling horizontal face structure: behavioral and electrophysiogical evidence for a tuning of visual face processing to horizontal information
Jacques, Corentin; Schiltz, Christine UL; Collet, Kevin et al

Poster (2011, May)

Recent psychophysical evidence indicates that a central feature of human face processing is its tuning to horizontally-oriented information. Specifically, filtering faces to remove all but the horizontal ... [more ▼]

Recent psychophysical evidence indicates that a central feature of human face processing is its tuning to horizontally-oriented information. Specifically, filtering faces to remove all but the horizontal information largely preserves behavioral signatures of face-specific processing, including the face inversion effect (FIE). Conversely, preserving only vertical information abolishes these effects. The purpose of the present experiments was twofold. First, in contrast to previous studies which used filtering, we manipulated orientation content of face images by randomizing Fourier phase spectrum in a narrow horizontal orientation band (H-randomization) or vertical orientation band (V-randomization). Phase-randomization was performed on face images in which spatial frequency amplitude spectrum (SF-AS) was either left unaltered or equalized across all SF orientations. Second, we investigated the time course of tuning to horizontal information using event-related potentials (ERP). Picture-plane inversion was used to evaluate whether the effects of orientation of phase-randomization arise due to inherent stimulus properties or to face-specific perceptual biases. In two psychophysics experiments, we observed that (1) upright faces were best discriminated when the horizontal structure was preserved (i.e. V-randomization) compared to H-randomization. (2) This phase-randomization effect was eliminated by inversion, resulting in (3) a smaller FIE for H-randomized than V-randomized faces. Although this pattern was still present when SF-AS was equalized across SF orientations, it was less consistent, suggesting that SF-AS in horizontal orientation contributes to the horizontal tuning of face perception. Consistent ERP evidence of horizontal tuning for upright face processing was observed in the N170 time-window, a well-known face-sensitive electrophysiological component. The N170 was delayed for H-randomized compared to V-randomized faces. Additionally, and in line with behavioural data, face inversion increased N170 latency to a smaller extent for H-randomized compared to V-randomized faces. Altogether, our findings indicate that horizontal tuning is a robust property of face perception that arises early in high-level visual cortex. [less ▲]

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See detailO EFEITO DO NIVEL SOCIOECONÔMICO NO DESENVOLVIMENTO COGNITIVO INFANTIL
Carneiro; Guedes; Rossi et al

Poster (2011, May)

A inteligência humana pode ser dividida em dois tipos de inteligência: a cristalizada, a qual se baseia em habilidades adquiridas e aprendizado passado, e a fluida, que se refere à capacidade de ... [more ▼]

A inteligência humana pode ser dividida em dois tipos de inteligência: a cristalizada, a qual se baseia em habilidades adquiridas e aprendizado passado, e a fluida, que se refere à capacidade de relacionar idéias e de resolver novos problemas. Esse estudo explora os efeitos do nível socioeconômico (NSE) no desenvolvimento de habilidades cognitivas fluidas e cristalizadas em crianças. A pesquisa contou com um total de 105 participantes de 6 a 8 anos, pertencentes a três diferentes níveis socioeconômicos (alto, médio e baixo) de acordo com o Critério de Classificação Econômica Brasil (ABEP). Foram recrutadas crianças do primeiro e segundo ano do ensino fundamental de escolas particulares, de bairro e públicas em Salvador. Cada grupo continha 35 participantes equiparados em idade, sexo e ano de escolaridade. Os grupos não diferiram significativamente em aspectos nutricionais, estado emocional, peso ao nascer e tempo de gestação. As crianças foram avaliadas por uma extensa bateria de medidas comportamentais que exploraram a inteligência cristalizada (vocabulário, sintaxe e desempenho acadêmico) e a inteligência fluida (memória operacional e raciocínio indutivo). Os resultados apontaram que crianças inseridas em condições desprivilegiadas (baixo NSE) apresentaram desempenho significativamente pior nas medidas de inteligência cristalizada, quando comparadas às crianças que cresceram em ambiente mais favorável (alto NSE); com tamanho do efeito significativo. As crianças de baixo NSE apresentaram, também, um pior desempenho nos testes de inteligência fluida, que, embora significativo, foram menos expressivos que os efeitos correspondentes nas medidas de linguagem. Este estudo mostra que o crescimento em ambientes de baixo NSE constitui um sério fator de risco para o desenvolvimento cognitivo infantil. Sugere, ainda, que alguns sistemas neurocognitivos são mais sensíveis ao NSE que outros: o sistema de linguagem é fortemente impactado pelo NSE, enquanto a memória operacional e a resolução de conflitos são moderadamente influenciadas. Tais achados relacionados ao perfil neurocognitivo do NSE na infância são essenciais no sentido de testar hipóteses mais específicas sobre mecanismos causais e maximizar o efeito de intervenções. Deste modo, pais e escolas desempenham um papel fundamental em prover um ambiente cognitivo estimulante, a fim de otimizar o desenvolvimento intelectual infantil. [less ▲]

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See detailToward a Revised Socioeconomic Index using the American Community Survey, 2000-2006
Rivas, Salvador UL; Hauser, Robert; Chang, Vicky

Poster (2011, April 13)

This report presents the application of a new set of socioeconomic indexes (SEIs) of occupations developed using the American Community Survey (ACS). In these analyses, the new SEIs are used to ... [more ▼]

This report presents the application of a new set of socioeconomic indexes (SEIs) of occupations developed using the American Community Survey (ACS). In these analyses, the new SEIs are used to characterize the socioeconomic standings of household heads and spouses associated with samples of children age 6-18 years. These children were extracted from two independent sources: the pooled 2000-2005 October Current Population Survey (CPS) and the 2005 ACS. We compared the new measures with the 1990-based measures from Hauser and Warren (1997) by performing correlation and regression analyses on the sample data to examine the relationships among three status-attainment variables -- education, occupation and income. Since the development of Duncan’s SEI (1961) for measuring the occupational attainment of individuals, subsequent measures have been updated not only to improve the validity of the measure but also to accommodate changes in the way occupation has been measured and classified. SEIs provide researchers with succinct and reliable measures for summarizing individuals’ or households’ positions in the socioeconomic hierarchy. With growing complexity and details in the new occupation classification system, many categories in the 2000 Census occupation codes, for example, cannot find their counterparts in the previous listings and thus the SEI is due for another update. The analyses presented in this report serve as a “test-drive” for the new SEIs. The results from our preliminary analyses indicate that despite the fact that the two pairs of occupational measures are not in the exact same metric, they behave very similarly in terms of their dependence on educational attainment, explanatory power on various earning and income measures and differentials across gender and race-ethnicity groups. [less ▲]

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See detailLong wavelength gravity field determination from GOCE using the acceleration approach
Weigelt, Matthias UL; Baur, O.; Reubelt, T. et al

Poster (2011, April)

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See detailShifts of spatial attention cued by irrelevant numbers: Electrophysiological evidence from a target discrimination task
Schuller, Anne-Marie UL; Hoffmann, Danielle UL; Schiltz, Christine UL

Poster (2011, April)

Fischer et al. demonstrated that a centrally presented number can shift attention to the left/right when its magnitude is small/large. Two electrophysiological studies described these attentional effects ... [more ▼]

Fischer et al. demonstrated that a centrally presented number can shift attention to the left/right when its magnitude is small/large. Two electrophysiological studies described these attentional effects as event-related potentials (ERPs) at centro-parietal sites. Since both studies used target detection tasks, it remains currently unknown whether similar results would be obtained with a discrimination task. We used ERPs to test whether digit cues also induce attention shifts when participants perform a feature-discrimination task on targets. ERPs were recorded whereas subjects discriminated the colour of lateral targets that were preceded by a central non-predictive digit. Analysis of cue-locked controlateral vs. ipsilateral ERP activity showed the emergence of early preparatory attention-directing components in parietal and frontal regions. Moreover, target-locked P1 components at occipito-parietal sites were significantly modulated by digit magnitude-target side congruency. These results demonstrate that irrelevant digit cues also bias sensory processing when embedded in a feature-discrimination task. [less ▲]

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See detailWhen numbers act as attentional cues: behavioral and fMRI investigations
Goffaux, Valerie; Hoffmann, Danielle UL; Martin, Romain UL et al

Poster (2011, February 11)

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See detailLongitudinal predictors of early mathematics: Number-specific versus domain-general mechanisms?
Hornung, Caroline UL; Brunner, Martin; Schiltz, Christine UL et al

Poster (2011, February 11)

Longitudinal predictors of early mathematics: Number-specific versus domain-general mechanisms? What is a good basis for developing mathematical competencies? While some authors propose that number ... [more ▼]

Longitudinal predictors of early mathematics: Number-specific versus domain-general mechanisms? What is a good basis for developing mathematical competencies? While some authors propose that number-specific abilities primarily contribute to early math development, other authors suggest that domain-general abilities are key. [less ▲]

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See detailSanté et contexte de travail. Construction d’un inventaire de contexte de travail
Pignault, Anne UL

Poster (2011, January)

Le travail est non seulement composé des différentes tâches à effectuer et de l’activité nécessaire pour les réaliser, mais aussi du « contexte de travail » regroupant à la fois les ... [more ▼]

Le travail est non seulement composé des différentes tâches à effectuer et de l’activité nécessaire pour les réaliser, mais aussi du « contexte de travail » regroupant à la fois les caractéristiques de l’environnement et les conditions spécifiques dans lesquelles se déroule cette activité (Pignault, 2007). Relativement peu de recherches se sont penchées sur l'impact des caractéristiques du contexte de travail sur la santé, réelle et/ou perçue, des salariés. Seules certaines études mettent en évidence le fait que ces éléments de contexte de travail peuvent être considérés comme contraintes ou ressources dans l’activité de travail (Chatigny, 2001) ou insistent sur la nécessité de créer un « contexte éthique » en entreprise (Pastoriza, Arino & Ricart, 2009). Cette communication affichée présente la première étape d'une recherche plus vaste portant sur l'impact du contexte de travail sur le bien-être et la santé des salariés et se centre sur la construction d'un inventaire de contexte de travail puisque, à notre connaissance, aucun outil francophone n'est à notre disposition. Notre recherche a été menée au sein de 9 entreprises appartenant à trois secteurs d’activité différents (l’industrie, la logistique et les services). Le repérage des éléments de contexte a nécessité diverses étapes : 1/ observations ouvertes et systématiques (menées à l’aide des outils F-Jas (1992) et PAQ (1999)) des situations de travail, 2/ entretiens semi- directifs auprès des opérateurs et des supérieurs et 3/ élaboration d’une liste d’éléments de contexte propres aux emplois-métiers d’un même secteur. Nous avons ensuite retenu les éléments de contexte observés et cités par l’ensemble des salariés, quel que soit le secteur, ce qui nous a permis de repérer sept dimensions contextuelles : l’organisation temporelle, la structure organisationnelle et le rapport aux autres, le degré de variété ou de « routine », le degré de prescription ou d’autonomie, le degré de complexité, les sources de pression, l’environnement physique et matériel et sécurité et de construire un inventaire de 39 items. Les analyses factorielles exploratoires menées auprès de 271 salariés nous permettent de retrouver cette structure. Par ailleurs, les alphas de Cronbach apparaissent comme satisfaisants (entre .68 et .74). Ces premiers résultats nous incitent à poursuivre le processus de validation de cet Inventaire de Contexte de Travail (ICT). Références: Chatigny, C. (2001). Les ressources de l’environnement: au cœur de la construction des savoirs professionnels en situation de travail et de la protection de la santé. PISTES, vol.3, n°2, 19p. Pastoriza, D., Arino, M.A., Ricart, J.E. (2009). Creating an Ethical Work Context: A Pathway to Generate Social Capital in the Firm. Journal of Business Ethics. 88:477-489. Pignault, A. (2007). Contexte de travail et analyse de l’expérience. Conception d’une méthode d’aide à l’analyse de l’expérience en contexte. Thèse de Psychologie du travail, Université Paris X [less ▲]

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See detailFacilitation and inhibition of return using numbers as attentional cues
Hoffmann, Danielle UL; Goffaux, Valérie; Schiltz, Christine UL

Poster (2011)

Behavioural studies have shown a relation between numbers and space (DeHevia et al., 2008). Fischer and colleagues (2003) showed that digits can act as central spatial cues in a target detection task ... [more ▼]

Behavioural studies have shown a relation between numbers and space (DeHevia et al., 2008). Fischer and colleagues (2003) showed that digits can act as central spatial cues in a target detection task, resulting in shorter reaction times (RT) for left-sided targets when preceded by small numbers and for right-sided targets when preceded by large numbers. This facilitation effect indicates that numbers orient visuo-spatial attention to the left or right hemifield, depending on their magnitude. To date no studies investigated whether this facilitation is followed by inhibition of return at longer intervals, as could be expected with visuo-spatial attention shifts. To this aim, we designed an analogous paradigm to Fischer et al.’s, introducing additional longer intervals. Participants (n=25) were presented a task irrelevant digit (1,2 vs. 8,9) for 400ms and had to detect a brief (100ms) lateral target appearing after a variable interval (100, 250, 500, 750, 1000, 1250ms). A 2x6 repeated measures ANOVA of mean RT, with congruency and interval as within-subject variables yielded a significant interaction (F(5,24)=2.3, p<0.05). As expected, targets were detected faster when appearing in the congruent (small-left, large-right) hemifield after 250ms. Using the regression method proposed by Lorch and Myers (1990), the slope at this interval was significantly negative (t(24)=1.70, p=0.05); indicating a facilitation for the detection of targets in the congruent hemifield) (cf. Fischer et al., 2003). At the 1250ms interval, targets were detected significantly slower when they appeared in the congruent compared to the incongruent hemifield (yielding significantly positive slopes at 1250ms: t(24)=2.68, p=0.007). These findings provide the first evidence that digits not only produce facilitation effects at shorter intervals, but also induce inhibitory effects at longer intervals, confirming the visuo-spatial nature of the attention shifts associated with Arabic digits. [less ▲]

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See detailFacilitation and inhibition of return using numbers as attentional cues
Hoffmann, Danielle UL; Goffaux, Valérie; Schiltz, Christine UL

Poster (2011)

Behavioural studies have shown a relation between numbers and space (DeHevia et al., 2008). Fischer and colleagues (2003) showed that digits can act as central spatial cues in a target detection task ... [more ▼]

Behavioural studies have shown a relation between numbers and space (DeHevia et al., 2008). Fischer and colleagues (2003) showed that digits can act as central spatial cues in a target detection task, resulting in shorter reaction times (RT) for left-sided targets when preceded by small numbers and for right-sided targets when preceded by large numbers. This facilitation effect indicates that numbers orient visuo-spatial attention to the left or right hemifield, depending on their magnitude. To date no studies investigated whether this facilitation is followed by inhibition of return at longer intervals, as could be expected with visuo-spatial attention shifts. To this aim, we designed an analogous paradigm to Fischer et al.’s, introducing additional longer intervals. Participants (n=22) were presented a task irrelevant digit (1,2 vs. 8,9) for 400ms and had to detect a brief (100ms) lateral target appearing after a variable interval (100, 250, 500, 750, 1000, 1250ms). A 2x6 repeated measures ANOVA of mean RT, with congruency and interval as within-subject variables yielded a significant interaction (F(5,21)=2.59, p=0.03). As expected, targets were detected significantly faster when appearing in the congruent (small-left, large-right) hemifield after 250ms (t(21)=2.01, p=0.029) (cf. Fischer et al., 2003). At 1250ms interval, targets were detected significantly slower when they appeared in the congruent compared to the incongruent hemifield (t(21)=2.29, p=0.016). These findings provide the first evidence that digits not only produce facilitation effects at shorter intervals, but also induce inhibitory effects at longer intervals, confirming the visuo-spatial nature of the attention shifts associated with Arabic digits. [less ▲]

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See detailEating Disorder Examination-Questionnaire: Prevalence of eating disturbances in the general population
Van Dyck, Zoé UL; de Zwaan, Martina; Braehler, Elmar et al

Poster (2011)

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See detailDifferential classical conditioning of heterotopic noxious counterstimulation-induced hypoalgesia
Scheuren, Raymonde; Anton, Fernand UL; Michaux, Gilles

Poster (2011)

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See detailThe SNARC effect – Does it depend on the level of mathematical training?
Hoffmann, Danielle UL; Mussolin, Christophe; Schiltz, Christine UL

Poster (2011)

Behavioural studies show a relation between numbers and space (DeHevia et al., 2008). One instance of this link is the SNARC (Spatial Numerical Association of Response Codes) effect, consisting in faster ... [more ▼]

Behavioural studies show a relation between numbers and space (DeHevia et al., 2008). One instance of this link is the SNARC (Spatial Numerical Association of Response Codes) effect, consisting in faster reaction times responding to small/large digits with the left/right hand respectively (Dehaene et al. 1993). The SNARC effect has often been replicated, but it is also characterized by high inter-subject variability (Wood et al. 2006a,b). Although differences in mathematical skills are an obvious candidate source for SNARC variability, this variable has not yet been explored systematically. While in their seminal study Dehaene and colleagues had included two groups of participants differing in their field of study (science vs. literature), the differences in SNARC effect strengths indicated by the result figures were not tested formally (see also Fischer and Rottmann (2005)). The present study aims to assess the influence of mathematical training, as instantiated by the enrollment in study fields characterized by distinct levels of mathematical requirements, on the SNARC effect. We only included students of either a subject with a strong mathematical focus (e.g. mathematics, computer sciences), or no mathematical requirements at all (e.g. literature, philosophy). Results (N=36; 18/group) yielded a significant overall SNARC effect, i.e. interaction between digit magnitude and response side [F(1,35)=9.51; p=0.004], but no influence of study group on this interaction [F(1,35)=0.92; p=0.345]. Interestingly though, including gender in the ANOVA yielded a significant four-way interaction [F(1,35)=6.34; p=0.017]. These results replicate previous findings in children (Schweiter et al. 2005), interpreted as gender-related differences in mental strategy use. [less ▲]

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See detailThe influence of number sense acuity and mathematical expertise on mental addition strategies
Guillaume, Mathieu UL; Nys, Julie; Content, Alain

Poster (2011)

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See detailNumber sense and mathematical expertise: The strategic view.
Guillaume, Mathieu UL; Nys, Julie; Content, Alain

Poster (2011)

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See detail健康情報ICカードの緊急医療支援機能
Nobuyuki, Kishida; Heinz, Andreas UL

Poster (2011)

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See detailDeveloping number-space associations: SNARC effects in a color discrimination task in 11-year-olds
Hoffmann, Danielle UL; Hornung, Caroline UL; Mussolin, Christophe et al

Poster (2011)

Behavioural studies show a relation between numbers and space in adults (DeHevia et al., 2008) and this association arises early in development (Opfer et al., 2010). The SNARC (Spatial Numerical ... [more ▼]

Behavioural studies show a relation between numbers and space in adults (DeHevia et al., 2008) and this association arises early in development (Opfer et al., 2010). The SNARC (Spatial Numerical Association of Response Codes) effect consists in faster reaction times (RTs) responding to small/large digits with the left/right hand respectively (Dehaene et al. 1993). It is thought to reflect the automaticity of the number-space link, since it arises not only during explicit magnitude judgment tasks, but also during magnitude-independent parity judgment tasks. Using a parity task Berch et al. (1999) found a SNARC effect in children of 9.2 years onwards, but not in younger children (7.8 years). One major issue raised was that parity judgments might be too difficult and therefore problematic to test young children (VanGalen&Reitsma, 2008). Hence, we designed a color judgment instead of a parity judgment task and tested 33 children from Grade 6 (mean age 11.4 years, SD 0.6). We also assessed number magnitude access using a magnitude judgment task. The results revealed a significantly negative slope in the color task [t(32)=2.47, p<0.01] and in the magnitude task [t(33)=1.75, p<0.05], reflecting a SNARC effect in both tasks (regression method by Lorch&Myers, 1990). A correlation analysis of the slopes of both tasks revealed a positive relationship (r=0.33, p<0.05) indicating that they partly measure the same processes. These results confirm the presence of robust SNARC effects in 6th-graders and indicate that they occur even using a simple color discrimination task that is strictly independent of semantic number processing. [less ▲]

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See detailZusammenhänge zwischen der subjektiven zirkadianen Phasenlage und psychischen Variablen.
Specht, M.; Kemper, Christoph UL; Bongard, S. et al

Poster (2010, October)

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See detailAlters- und Bereichsunterschiede in der Erwartung und Beeinflussbarkeit von Verlusten
Mustafic, Maida UL; Freund, Alexandra M.

Poster (2010, September)

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See detailMeasuring Schwartz‘ second order value orientations using a new scale for survey research
Beierlein, C.; Kemper, Christoph UL; Kovaleva, A. et al

Poster (2010, July)

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See detailImpact du sens du travail sur l'attachement des enseignants à leurs lieux de travail
Rioux, Liliane; Pignault, Anne UL

Poster (2010, July)

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See detailValidity of the GSOEP short scale for the Locus of Control
Kovaleva, A.; Beierlein, C.; Kemper, Christoph UL et al

Poster (2010, July)

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See detailNew Metropolitan Mainstream: RhineRuhr
Carr, Constance UL

Poster (2010, June)

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See detailAn agenda for establishing the Ecological Footprint as communication instrument and indicator for sustainable development in small countries: Case study Luxembourg
Hild, Paula UL; Schmitt, Bianca; Morgane, Mey et al

Poster (2010, June)

The Ecological Footprint methodology proposed by the Global Footprint Network (GFN) seems to be not entirely appropriate for small countries with less than one million inhabitants [Ewing et al., 2008 ... [more ▼]

The Ecological Footprint methodology proposed by the Global Footprint Network (GFN) seems to be not entirely appropriate for small countries with less than one million inhabitants [Ewing et al., 2008]. This may be a reason why e.g. results for Luxembourg, a country with 470,000 inhabitants, have never been included into official country Footprint comparisons. Therefore, the methodology needs to be adapted to be used for communication purpose in Luxembourg. This contribution presents Luxembourg’s approach for illustrating the national consumption impacts to finally discuss the integration of the Ecological Footprint as an indicator for sustainable development in the national indicator system. [less ▲]

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See detailMultilingualism and language learning: A study of Portuguese immigrant children growing up in a multilingual society
Engel de Abreu, Pascale UL

Poster (2010, January)

Working memory is suggested to play a crucial role in children’s native and foreign language acquisition. The major aim of the present study was to explore how growing up with an immigrant background ... [more ▼]

Working memory is suggested to play a crucial role in children’s native and foreign language acquisition. The major aim of the present study was to explore how growing up with an immigrant background might affect children’s linguistic and working memory abilities. Twenty 7-year old Portuguese children from Luxembourg, who speak Portuguese at home and acquire Luxembourgish in a natural setting and German through scholastic instruction, participated in the study. Children completed several measures of verbal short-term memory (digit recall and nonword repetition) and complex working memory span tasks (counting recall and backwards digit recall) in Luxembourgish and in Portuguese. Participants were further assessed on vocabulary measures in Portuguese, Luxembourgish, and German, and on syntactic comprehension in Luxembourgish and German. The Portuguese children were compared to three groups of monolingual speakers: 20 Luxembourgish children living in Luxembourg and 40 Portuguese speaking children growing up in Brazil. The Brazilian children were recruited from families of high and low socio-economical status (SES) with 20 children in each group. Participants in the Luxembourgish sample were of high SES and the Portuguese children were of lower SES. Groups were matched on age, nonverbal ability, and gender. The results showed that in the Portuguese immigrant children, language competences in Portuguese, Luxembourgish, and German were at an equivalent level that fell below the linguistic competence of native speakers from Brazil and from Luxembourg. For the working memory measures the data showed first that the Portuguese children performed equally well in the Luxembourgish and Portuguese versions of the digit recall, backwards digit recall, and counting recall tasks, and second that the Portuguese children’s performance in these three measures did not differ from their monolingual peers from Luxembourg and Brazil. For nonword repetition the results showed that the Portuguese children performed equally well to their Brazilian counterparts in the repetition of the Portuguese sounding nonwords whereas their performance in the repetition of the Luxembourgish nonwords was below that of the native Luxembourgish speakers. This latter finding is consistent with the position that verbal short-term memory performance is better for familiar rather than unfamiliar lexical material. Despite normal general cognitive functions, as documented by the working memory measures, immigrant children showed significantly reduced language performance that can not be easily explained by differences in wealth or other socio economic factors. Instead, the findings appear to be a direct consequence of growing up as an immigrant in a multilingual society raising the question of the necessity of specific language support for immigrant children growing up in a multilingual society. The results also have important practical utility: Whereas language assessments based on measurements of vocabulary may overestimate language learning difficulties in children with an immigrant background working memory measures might not. As working memory measures are highly associated with children’s language learning and more general academic progress, these tests can provide methods of identifying children with potential learning difficulties that are unlikely to be distorted by differences in wealth or other significant environmental factors that have an impact on language learning opportunities. [less ▲]

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See detailWhen small is left and large is right : Behavioural evidence for attentional shifts due to irrelevant numerical cues
Hoffmann, Danielle UL; Goffaux, Valérie; Schiltz, Christine UL

Poster (2010)

Numerous behavioural studies indicate the existence of a link between numerical representations and visuo-spatial processes (for review see DeHevia et al., 2008). A striking demonstration of this link was ... [more ▼]

Numerous behavioural studies indicate the existence of a link between numerical representations and visuo-spatial processes (for review see DeHevia et al., 2008). A striking demonstration of this link was provided by Fischer and colleagues (2003), who reported that participants detect a target faster in the left hemifield, if preceded by a small number (e.g. 2 or 3) and faster in the right hemifield if preceded by a large number (e.g. 8 or 9). This is strong evidence that numbers orient visuo-spatial attention to the left or right hemifield, depending on their magnitude (e.g., small and large, respectively) (see also Galfano et al., 2006; Ristic et al., 2006). We designed a modified version of this target detection paradigm, by replacing the detection task with a target discrimination task (cf. Hommel et al., 2001). The participants (n=16) were presented 1 task irrelevant digit (1,2 vs. 8,9) for 400ms. After a variable inter-stimulus interval (500, 1000 or 2000ms), they had to discriminate the colour of a brief (100ms) lateral target. We hypothesized that the centrally presented numbers would induce an orientation of attention, in the same direction as the initial observations by Fischer et al. (2003). The current results indicate a significant effect, but only for the shortest digit-target interval (500ms). We observed a significant interaction between number magnitude (small/large) and side of target presentation (left/right) (F1,15 =7.784, p<0.014). These findings indicate that the attentional shifts induced by irrelevant numerical material are independent of the exact nature of target processing (discrimination vs. detection). [less ▲]

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See detailThe effect of viruses on phytoplankton and prokaryotic nutrient assimilation: A single cell approach
Sheik, Abdul UL; Brussaard, Corina; Lavik, Gaute et al

Poster (2010)

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See detailWandel im Bildungswesen, zunehmende Komplexität und Web 2.0: Sind traditionelle Intelligenztests noch "up to date"?
Sonnleitner, Philipp UL; Brunner, Martin; Keller, Ulrich UL et al

Poster (2010)

Grundlegender Wandel im schulischen Bereich führt zur berechtigten Frage, inwiefern nicht Innovationen in der Intelligenzdiagnostik nötig wären, um die hohe prädiktive Validität und dadurch wesentliche ... [more ▼]

Grundlegender Wandel im schulischen Bereich führt zur berechtigten Frage, inwiefern nicht Innovationen in der Intelligenzdiagnostik nötig wären, um die hohe prädiktive Validität und dadurch wesentliche Bedeutung bei Schulplatzierungsentscheidungen weiterhin zu sichern. Die stärkere Betonung fächerübergreifender Kompetenzen, eine vermehrte Einbindung des Computers in Unterricht und Alltag sowie zunehmende Komplexität in der Arbeitswelt führen zu neuen Herausforderungen und beleben alte Kritik wieder. In diesem Kontext wurden immer wieder computerbasierte Problemlöseszenarien als vielversprechender Ansatz genannt, Schwächen traditioneller Intelligenztests zu überwinden. Vorteile werden, neben dem dynamischen Testformat und einer vollständigeren Abdeckung des Intelligenzbegriffes, unter anderem auch in erhöhter face-validity gesehen. Während bisherige Studien den Schwerpunkt auf das empirische Verhältnis zwischen Leistungsmaßen der Szenarien und traditionellen Intelligenzmaßen setzten, versucht dieser Beitrag, bewusst die Diskussion um theoretische Aspekte zu ergänzen. Einer Analyse der Anforderungen die an eine aktuelle Intelligenzdiagnostik zu stellen sind, folgt ein systematischer Vergleich traditioneller Intelligenztestformate mit computerbasierten Problemlöseszenarien. Konkrete Beispiele sowie aktuelle Daten zur Pilotierung eines derartigen Szenarios zur Intelligenzdiagnostik ergänzen die Diskussion. [less ▲]

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See detailCognitive estimation in the ideation phase of engineering design
Adolphy, Sebastian; Gericke, Kilian UL; Blessing, Lucienne UL

Poster (2010)

Estimation in its diverse forms is assumed to be relevant for problem solving in engineering design due to the inherent deficiencies in information availability and reliability. Nevertheless aside from ... [more ▼]

Estimation in its diverse forms is assumed to be relevant for problem solving in engineering design due to the inherent deficiencies in information availability and reliability. Nevertheless aside from some exception estimation as a method is hardly mentioned in standard literature on systematic approaches to engineering design like Pahl and Beitz. As well it is rarely deliberate addressed in engineering education. Engineering designers are expected to gain estimation competence by experience. Good performance in estimation and the development of estimation competence by hat is left to chance. Estimation as a problem solving strategy covers a wide range of activities on a continuous spectrum between the extremes of random guesses and highly mathematical statistics based approaches. Our research addresses estimation activities which are solely based on cognitive performance, without using specific mathematical procedures or technological support. Our current study is an explorative, qualitative protocol analysis of two idea creation meetings addressing different problems in the early phases of a technology-driven innovation project recorded by the DTRS7 organisation. The addressed research questions are: Where, how, why and what for is estimation used in engineering design? This analysis should give further insight in the not widely delineated topic of estimation in engineering design. [less ▲]

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See detailWorking memory and fluid intelligence
Engel de Abreu, Pascale UL; Gathercole; Conway, A

Poster (2009, November)

The present study investigates how working memory and fluid intelligence are related in young children and which aspect of working memory span tasks– short-term storage or controlled attention - might ... [more ▼]

The present study investigates how working memory and fluid intelligence are related in young children and which aspect of working memory span tasks– short-term storage or controlled attention - might drive the relationship. A sample of 119 children were followed from kindergarten to 2nd grade and completed assessments of working memory, short-term memory, and fluid intelligence. The data showed that working memory, verbal short-term memory, and fluid intelligence were highly related but separate constructs in young children. The results further showed that when the common variance between working memory and short-term memory was controlled, the residual working memory factor manifested significant links with fluid intelligence whereas the residual short-term memory factor did not. These findings suggest that in young children the executive demands rather than the storage component of working memory span tasks are the source of their link with fluid intelligence. [less ▲]

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See detailGibt es einen Zusammenhang zwischen Schlafbezogenen Atemstörungen (SBAS) und Angstsensitivität?
Schröder, A.; Kemper, Christoph UL; Specht, M. et al

Poster (2009, November)

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See detailStudents in Anger - How do teachers' provocations influence anger regulation?
Germar, M.; Steffgen, Georges UL

Poster (2009, November)

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See detailAngstsensitivität in einer Längsschnittuntersuchung bei Patienten eines interdisziplinären Schlaflabors
Blenn, J.; Kemper, Christoph UL; Specht, M. et al

Poster (2009, November)

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