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Titolo:
ELECTROPHYSIOLOGICAL CORRELATES OF FEATURE ANALYSIS DURING VISUAL-SEARCH
Autore:
LUCK SJ; HILLYARD SA;
Indirizzi:
UNIV CALIF SAN DIEGO,DEPT NEUROSCI,0608,9500 GILMAN DR LA JOLLA CA 92093
Titolo Testata:
Psychophysiology
fascicolo: 3, volume: 31, anno: 1994,
pagine: 291 - 308
SICI:
0048-5772(1994)31:3<291:ECOFAD>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; SELECTIVE ATTENTION; EVOKED-POTENTIALS; COLOR; DISCRIMINATION; ORIENTATION; SEGREGATION; COMPONENT;
Keywords:
EVOKED POTENTIAL (EP); EVENT-RELATED POTENTIAL (ERP); VISUAL SEARCH; VISUAL ATTENTION; AUTOMATIC DETECTION; POP-OUT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
S.J. Luck e S.A. Hillyard, "ELECTROPHYSIOLOGICAL CORRELATES OF FEATURE ANALYSIS DURING VISUAL-SEARCH", Psychophysiology, 31(3), 1994, pp. 291-308

Abstract

Event-related brain potentials (ERPs) were recorded from normal youngadults during visual search tasks in which the stimulus arrays contained either eight identical items (homogeneous arrays) or seven identical items and one deviant item (pop-out arrays). Four experiments were conducted in which different classes of stimulus arrays were designated targets and the remaining stimulus arrays were designated nontargets. In Experiments 1 and 2, both target and nontarget pop-out stimuli elicited an enhanced anterior N2 wave and a contralaterally larger posterior P1 wave, but Experiments 3 and 4 demonstrated that these components do not reflect fully automatic pop-out detection processes. In all four experiments, target pop-outs elicited enlarged anterior P2, posterior N2, occipital P3, and parietal P3 waves. The target-elicited posterior N2 wave contained a contralateral subcomponent (N2pc) that exhibited a focus over occipital cortex in maps of current source density. The overall pattern of results was consistent with guided search models in which preattentive stimulus information is used to guide attention to task-relevant stimuli.

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Documento generato il 22/09/20 alle ore 13:31:31