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Titolo:
Combined expectancies: Event-related potentials reveal the early benefits of spatial attention that are obscured by reaction time measures
Autore:
Handy, TC; Green, V; Klein, RM; Mangun, GR;
Indirizzi:
Univ Calif Davis, Dept Psychol, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 is, Dept Psychol, Davis, CA 95616 USA Univ Calif Davis, Ctr Neurosci, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 is, Ctr Neurosci, Davis, CA 95616 USA Dalhousie Univ, Dept Psychol, Halifax, NS, Canada Dalhousie Univ Halifax NS Canada Univ, Dept Psychol, Halifax, NS, Canada
Titolo Testata:
JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE
fascicolo: 2, volume: 27, anno: 2001,
pagine: 303 - 317
SICI:
0096-1523(200104)27:2<303:CEEPRT>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL SELECTIVE ATTENTION; ELECTROPHYSIOLOGICAL EVIDENCE; BRAIN POTENTIALS; NEURAL MECHANISMS; STIMULUS; COLOR; DETECTABILITY; EXTRASTRIATE; LOCATION; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Handy, TC Dartmouth Coll, Ctr Cognit Neurosci, 6162 Moore Hall, Hanover, NH 03755 USA Dartmouth Coll 6162 Moore Hall Hanover NH USA 03755 NH 03755 USA
Citazione:
T.C. Handy et al., "Combined expectancies: Event-related potentials reveal the early benefits of spatial attention that are obscured by reaction time measures", J EXP PSY P, 27(2), 2001, pp. 303-317

Abstract

Visual spatial attention has been likened to a "spotlight" that selectively facilitates the perceptual processing of events at covertly attended locations. However, if participants have advance knowledge of the likely location of an impending target and the likely response it will require, facilitation in response performance does not occur for targets at the expected (orattended) location that require an unexpected response. Event-related potentials (ER-Ps) were recorded during a discrimination task in which the mostlikely target location and target response were simultaneously cued prior to target onset. The ERPs showed evidence of enhanced perceptual-level processing for all targets at attended locations. These results suggest that the lack of response facilitation for unexpected targets at attended locations is likely due to postperceptual processes that are activated by the inclusion of nonspatial stimulus expectancies, response expectancies, or both.

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Documento generato il 21/09/20 alle ore 12:58:09