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The role of spatial information in advance task-set control: an event-related potential study.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Astle, D. E. Jackson, G. M. Swainson, R.
Description	Country affiliation: United kingdom Author Affiliation: Astle DE ( Department of Experimental Psychology, University of Oxford, Oxford, UK. duncan.astle@psy.ox.ac.uk)
Abstract	Task-switching has proved to be a fruitful paradigm for studying cognitive control mechanisms. Interestingly, this avenue of study has revealed that subjects are, to some degree, able to bring about a change in task-set prior to the performance of that task (provided that they are given advance warning of the upcoming task, for instance in the form of a cue). Event-related potentials (ERPs) have proved to be a good way of measuring these rapid anticipatory control processes. To explore these processes further, the current study examined the relationship between the availability of spatial information and cue-locked task-switching ERP effects. Two groups of subjects were compared: one group could separate the task-sets on the basis of the targets' colour (the 'colour' group), the second on the basis of the targets' location (the 'spatial' group). The performance of both groups benefited to the same extent from advance cueing of task-transitions (switches or repeats), yet the ERP data revealed cue-locked (but not target-locked) differences between the two groups. The most striking of these differences was the absence of both a late positivity over posterior scalp and a late negativity over frontal scalp when the spatial group switched between tasks. Thus, it seems unlikely that these effects index stimulus-response 'reconfiguration'per se--as the mappings were identical for both groups of subjects--but rather that these task-switching processes are sensitive to how the mappings are represented.
File Format	HTM / HTML
ISSN	0953816X
Issue Number	7
Volume Number	28
e-ISSN	14609568
Journal	European Journal of Neuroscience
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2008-10-01
Publisher Place	France
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Neuroscience Attention Physiology Cognition Cues Evoked Potentials Psychomotor Performance Space Perception Adult Brain Mapping Cerebral Cortex Electroencephalography Female Humans Male Neuropsychological Tests Photic Stimulation Young Adult Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Neuroscience

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