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Titolo:
SPATIAL-FILTERING DURING VISUAL-SEARCH - EVIDENCE FROM HUMAN ELECTROPHYSIOLOGY
Autore:
LUCK SJ; HILLYARD SA;
Indirizzi:
UNIV IOWA,DEPT PSYCHOL,11 SEASHORE HALL E IOWA CITY IA 52242 UNIV CALIF SAN DIEGO,DEPT NEUROSCI LA JOLLA CA 92093
Titolo Testata:
Journal of experimental psychology. Human perception and performance
fascicolo: 5, volume: 20, anno: 1994,
pagine: 1000 - 1014
SICI:
0096-1523(1994)20:5<1000:SDV-EF>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; INFERIOR TEMPORAL NEURONS; BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; FEATURE-INTEGRATION; SELECTIVE ATTENTION; ILLUSORY CONJUNCTIONS; SHAPE-RECOGNITION; BRAIN POTENTIALS; PERCEPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Citazioni:
67
Recensione:
Indirizzi per estratti:
Citazione:
S.J. Luck e S.A. Hillyard, "SPATIAL-FILTERING DURING VISUAL-SEARCH - EVIDENCE FROM HUMAN ELECTROPHYSIOLOGY", Journal of experimental psychology. Human perception and performance, 20(5), 1994, pp. 1000-1014

Abstract

The identification of targets in visual search arrays may be improvedby suppressing competing information from the surrounding distractor items. The present study provided evidence that this hypothetical filtering process has a neural correlate, the ''N2pc'' component of the event-related potential waveform. The N2pc was observed when a target item was surrounded by competing distractor items but was absent when the array could be rejected as a nontarget on the basis of simple feature information. In addition, the N2pc was eliminated when filtering wasdiscouraged by removing the distractor items, making the distractors relevant, or making all items within an array identical. Combined withprevious topographic analyses, these results suggest that attentionalfiltering occurs in occipital cortex under the control of feedback from higher cortical regions after a preliminary feature-based analysis of the stimulus array.

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Documento generato il 21/09/20 alle ore 06:00:08