References of "Lukito, Steve"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailEffects of resting heart rate variability on performance in the P300 brain-computer interface
Kaufmann, Tobias; Vögele, Claus UL; Sütterlin, Stefan UL et al

in International Journal of Psychophysiology (2012), 83(3), 336-341

Objective: Brain computer interfaces (BCI) can serve as a communication system for people with severe impairment in speech and motor function due to neurodegenerative disease or injury. Reasons for inter ... [more ▼]

Objective: Brain computer interfaces (BCI) can serve as a communication system for people with severe impairment in speech and motor function due to neurodegenerative disease or injury. Reasons for inter-individual differences in capability of BCI usage are not yet fully understood. Paradigms making use of the P300 event-related potential are widely used. Success in a P300 based BCI requires the capability to focus attention and inhibit interference by distracting irrelevant stimuli. Such inhibitory control has been closely linked to peripheral physiological parameters, such as heart rate variability (HRV). The present study investigated the association between resting HRV and performance in the P300-BCI. Methods: Heart rate was recorded from 34 healthy participants under resting conditions, and subsequently a P300-BCI task was performed. Results: Frequency domain measures of HRV were significantly associated with BCI-performance, in that higher vagal activation was related to better BCI-performance. Conclusions: Resting HRV accounted for almost 26% of the variance of BCI performance and may, therefore, serve as a predictor for the capacity to control a P300 oddball based BCI. Significance: This is the first study to demonstrate resting vagal-cardiac activation to predict capability of P300-BCI usage. [less ▲]

Detailed reference viewed: 141 (0 UL)
Full Text
Peer Reviewed
See detailEnhanced behavioral inhibition in restrained eaters
Meule, Adrian; Lukito, Steve; Vögele, Claus UL et al

in Eating Behaviors (2011), 12(2), 152-155

Impulsivity has been found to play a decisive role in both addiction and disordered eating. Behavioral and self-report measures show impulsive tendencies to even occur in non-clinical samples, e.g ... [more ▼]

Impulsivity has been found to play a decisive role in both addiction and disordered eating. Behavioral and self-report measures show impulsive tendencies to even occur in non-clinical samples, e.g. restrained eaters. Within this group, these traits interact with high reactivity to food-related cues leading to overeating. The aim of the present study was to investigate if restrained eaters show this behavioral disinhibition specifically in response to food-cues. Participants performed a Go/No-Go-task with stimuli encircled by pictures of high caloric foods or neutral objects. In contrast to our hypotheses, participants with medium-to-high restrained eating made less commission errors in response to both food and neutral pictures than unrestrained eaters. Additionally, participants' inhibitory performance in the high-restrained group were enhanced in the presence of food pictures. Results are in line with expanding evidence of counteractive-control mechanisms when restrained eaters are confronted with tempting food-related cues. [less ▲]

Detailed reference viewed: 135 (0 UL)