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Titolo:
AN EVENT-RELATED POTENTIAL (ERP) STUDY OF TRANSIENT AND SUSTAINED VISUAL-ATTENTION TO COLOR AND FORM
Autore:
EIMER M;
Indirizzi:
UNIV MUNICH,INST PSYCHOL,LEOPOLDSTR 13 D-80802 MUNICH GERMANY
Titolo Testata:
Biological psychology
fascicolo: 3, volume: 44, anno: 1997,
pagine: 143 - 160
SICI:
0301-0511(1997)44:3<143:AEP(SO>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELECTIVE ATTENTION; SPATIAL ATTENTION; HEMISPHERIC-DIFFERENCES; BRAIN POTENTIALS; LOCATION; STIMULI; CONJUNCTIONS; SENSITIVITY; ORIENTATION; MODULATION;
Keywords:
EVENT-RELATED POTENTIAL; PERCEPTION; ATTENTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
M. Eimer, "AN EVENT-RELATED POTENTIAL (ERP) STUDY OF TRANSIENT AND SUSTAINED VISUAL-ATTENTION TO COLOR AND FORM", Biological psychology, 44(3), 1997, pp. 143-160

Abstract

Event-related potential (ERP) effects of transient and sustained non-spatial visual attention were investigated in an experiment where subjects were instructed to attend to the color or form of visual stimuli in order to detect infrequently presented targets with the relevant feature. The to-be-attended feature was either varied in a trial-by-trial fashion (transient attention) or was kept constant for an entire experimental block (sustained attention). Both transient and sustained attention resulted in a larger negativity for attended as compared to unattended stimuli between 200 and 300 ms post-stimulus. This effect wasmore pronounced for sustained attention than for transient attention and larger for attention to color than for attention directed to stimulus form. In the sustained. but not in the transient attention condition, color attention resulted in larger positivities for attended stimuli between 150 and 200 ms and in the P3 time range. These effects are interpreted as evidence for the existence of non-spatial attentional selection processes that are more effective under sustained than under transient attention conditions and are different from processes of visual-spatial attention. Moreover, the results indicate a special statusfor sustained attention to stimulus color. (C) 1997 Elsevier Science B.V.

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Documento generato il 03/04/20 alle ore 10:15:34