?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Restriction+of+task+processing+time+affects+cortical+activity+during+processing+of+a+cognitive+task%3A+an+event-related+slow+cortical+potential+study&rft.creator=Lamm%2C+Claus&rft.creator=Bauer%2C+Herbert&rft.creator=Vitouch%2C+Oliver&rft.creator=Durec%2C+Susanne&rft.creator=Gronister%2C+Roswitha&rft.creator=Gst%C3%A4ttner%2C+Reinhard&rft.subject=Brain+Imaging&rft.subject=Cognitive+Psychology&rft.subject=Neuropsychology&rft.description=As+is+known+from+psychometrics%2C+restriction+of+task+processing+time+by+the+instruction+to+respond+as+quickly+and+accurately+as+possible+leads+to+task-unspecific+cognitive+processing.+Since+this+task+processing+mode+is+used+in+most+functional+neuroimaging+studies+of+human%0Acognition%2C+this+may+evoke+cortical+activity+that+is+functionally+not+essential+for+the+particular+task+under+investigation.+Using+topographic+recordings+of+event-related+slow+cortical+potentials%2C+two+experiments+have+been+performed+to+investigate+whether+cortical+activity+during%0Aprocessing+of+a+visuo-spatial+imagery+task+is+substantially+influenced+by+the+time+provided+to+process+the+task.+Furthermore%2C+it+was+investigated+whether+this+effect+is+additionally+modulated+by+a+subject%C2%92s+task-specific+ability.+The+instruction+to+respond+as+quickly+and+accurately+as+possible+led+to+increased+negative+slow+cortical+potential+amplitudes+over+parietal+and+frontal+regions+and+significantly+interacted+with+task-specific+ability.+While+cortical+activity+recorded+over+parietal+and+frontal+regions+was+different+between+subjects+with+low+and+high+spatial+ability+when+processing+time+was+unrestricted%2C+no+such+differences+were+found+between+ability+groups+when+subjects%0Awere+instructed+to+answer+both+quickly+and+accurately.+These+results+suggest+that+restricting+processing+time+has+considerable+effects+on+the+amount+and+the+pattern+of+brain+activity+during+cognitive+processing+and+should+be+taken+into+account+more+explicitly+in+the+experimental+design+and+interpretation+of+neuroimaging+studies+of+cognition.&rft.publisher=Elsevier+Science&rft.contributor=Purpura%2C+D.P.&rft.date=2001&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1632%2F3%2Fcog_brain_res.pdf&rft.identifier=++Lamm%2C+Claus+and+Bauer%2C+Herbert+and+Vitouch%2C+Oliver+and+Durec%2C+Susanne+and+Gronister%2C+Roswitha+and+Gst%C3%A4ttner%2C+Reinhard++(2001)+Restriction+of+task+processing+time+affects+cortical+activity+during+processing+of+a+cognitive+task%3A+an+event-related+slow+cortical+potential+study.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1632%2F