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Titolo:
ARE THE SAME ATTENTIONAL MECHANISMS USED TO DETECT VISUAL-SEARCH TARGETS DEFINED BY COLOR, ORIENTATION, AND MOTION
Autore:
GIRELLI M; LUCK SJ;
Indirizzi:
UNIV IOWA,DEPT PSYCHOL,11 SEASHORE HALL E IOWA CITY IA 52242 UNIV IOWA,DEPT PSYCHOL IOWA CITY IA 52242
Titolo Testata:
Journal of cognitive neuroscience
fascicolo: 2, volume: 9, anno: 1997,
pagine: 238 - 253
SICI:
0898-929X(1997)9:2<238:ATSAMU>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; SELECTIVE ATTENTION; MACAQUE MONKEY; AREA MT; PARVOCELLULAR CONTRIBUTIONS; STRIATE CORTEX; BRAIN ACTIVITY; GUIDED SEARCH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
70
Recensione:
Indirizzi per estratti:
Citazione:
M. Girelli e S.J. Luck, "ARE THE SAME ATTENTIONAL MECHANISMS USED TO DETECT VISUAL-SEARCH TARGETS DEFINED BY COLOR, ORIENTATION, AND MOTION", Journal of cognitive neuroscience, 9(2), 1997, pp. 238-253

Abstract

Motion information tends to be segregated from color and form information in the visual system, both perceptually and neuroanatomically, and it is therefore possible that different mechanisms of attention are used to select targets defined by these different feature types duringvisual search. To test this hypothesis, we recorded the N2pc component of the event-related potential waveform during visual search tasks with color, orientation, and motion targets. The N2pc component has previously been shown to reflect a specific attentional mechanism that ispresent for color and form targets, and we sought to determine whether this component would also be present for motion targets. The N2pc component was indeed observed for motion targets as well as color and orientation targets, consistent with the use of a common attentional mechanism across feature types. In addition, we found that motion singletons (i.e., individual items that moved in the opposite direction from the other items in the array) elicited an N2pc component even when they were task-irrelevant, indicating that motion discontinuities map produce an automatic orienting of attention.

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