Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters










Database
Language
Publication year range
1.
Brain Res ; 1347: 90-103, 2010 Aug 06.
Article in English | MEDLINE | ID: mdl-20570659

ABSTRACT

Over the past decade, neuroimaging and electrophysiological studies of working memory (WM) have made progress in distinguishing the neural substrates of central executive (CE) functions from substrates of temporary storage subsystems. However, the degree to which CE-related processes and their substrates may be further fractionated is less clear. The present study measured event-related potentials (ERPs) in a running memory paradigm, to study modality-specific CE-related processes in verbal and spatial WM. Participants were asked to remember either verbal (digit identity) or spatial (digit location) information for the first or last three items in a variable length sequence of spatially distributed digit stimuli. Modality-specific WM demand-sensitive ERP amplitude effects were selectively observed over left prefrontal areas under verbal WM performance and over right prefrontal areas under spatial WM performance. In addition, distinct patterns of item-by-item sensitivity under high-CE-demand conditions suggested qualitatively different processing strategies for verbal versus spatial tasks. These results suggest that both modality-specific and task-general CE-related processes are likely operational in many WM situations and that careful dissociative methods will be needed to properly further fractionate and characterize these component CE-related processes and their neurological substrates.


Subject(s)
Brain Mapping , Memory, Short-Term/physiology , Prefrontal Cortex/physiology , Space Perception/physiology , Verbal Learning/physiology , Adolescent , Adult , Electroencephalography/methods , Evoked Potentials/physiology , Female , Functional Laterality/physiology , Humans , Male , Neuropsychological Tests , Pattern Recognition, Visual/physiology , Reaction Time/physiology , Time Factors , Young Adult
2.
Acta Psychol (Amst) ; 134(1): 70-8, 2010 May.
Article in English | MEDLINE | ID: mdl-20064634

ABSTRACT

Research into the perceptual and cognitive effects of playing video games is an area of increasing interest for many investigators. Over the past decade, expert video game players (VGPs) have been shown to display superior performance compared to non-video game players (nVGPs) on a range of visuospatial and attentional tasks. A benefit of video game expertise has recently been shown for task switching, suggesting that VGPs also have superior cognitive control abilities compared to nVGPs. In two experiments, we examined which aspects of task switching performance this VGP benefit may be localized to. With minimal trial-to-trial interference from minimally overlapping task set rules, VGPs demonstrated a task switching benefit compared to nVGPs. However, this benefit disappeared when proactive interference between tasks was increased, with substantial stimulus and response overlap in task set rules. We suggest that VGPs have no generalized benefit in task switching-related cognitive control processes compared to nVGPs, with switch cost reductions due instead to a specific benefit in controlling selective attention.


Subject(s)
Attention , Pattern Recognition, Visual , Proactive Inhibition , Psychomotor Performance , Space Perception , Video Games , Adolescent , Cues , Executive Function , Functional Laterality , Generalization, Psychological , Humans , Male , Software , Young Adult
SELECTION OF CITATIONS
SEARCH DETAIL
...