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Titolo:
An ERP study of sustained spatial attention to stimulus eccentricity
Autore:
Eimer, M;
Indirizzi:
Univ London Birkbeck Coll, Dept Psychol, London WC1E 7HX, England Univ London Birkbeck Coll London England WC1E 7HX ndon WC1E 7HX, England
Titolo Testata:
BIOLOGICAL PSYCHOLOGY
fascicolo: 3, volume: 52, anno: 2000,
pagine: 205 - 220
SICI:
0301-0511(200004)52:3<205:AESOSS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL SELECTIVE ATTENTION; BRAIN POTENTIALS; FIELD; SENSITIVITY; LOCATION; SPACE;
Keywords:
visual-spatial attention; sustained attention; event-related potentials; Nd; spatial selectivity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Eimer, M Univ London Birkbeck Coll, Dept Psychol, Malet St, London WC1E 7HX, England Univ London Birkbeck Coll Malet St London England WC1E 7HX gland
Citazione:
M. Eimer, "An ERP study of sustained spatial attention to stimulus eccentricity", BIOL PSYCH, 52(3), 2000, pp. 205-220

Abstract

Effects of attention on event-related brain potentials (ERPs) were measured when subjects kept sustained attention focused on ring-shaped regions of visual space to detect infrequently presented targets at a given eccentricity. In line with a previous study that employed a trial-by-trial cueing paradigm, no modulations of sensory-evoked P1 and N1 components were found. This suggests that attentional selectivity in complex spatial selection tasksis primarily located at post-perceptual processing levels. Enhanced negativities for attended as compared to unattended stimuli were present between 220 and 380 ms post-stimulus and were followed by an enlarged positivity for attended stimuli in the P3 time range. These effects reflected the distribution of attention in visual space, in part consistent with 'attentional gradient' and 'zoom-lens' models. However, ERPs also suggested the presence of selective mechanisms that exclude irrelevant stimuli located between twosimultaneously attended areas. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 12:24:27