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Titolo:
EFFECTS OF SPATIAL CUEING ON LUMINANCE DETECTABILITY - PSYCHOPHYSICALAND ELECTROPHYSIOLOGICAL EVIDENCE FOR EARLY SELECTION
Autore:
LUCK SJ; HILLYARD SA; MOULOUA M; WOLDORFF MG; CLARK VP; HAWKINS HL;
Indirizzi:
UNIV CALIF SAN DIEGO,DEPT NEUROSCI 0608,9500 GILMAN DR LA JOLLA CA 92093 UNIV CALIF SAN DIEGO,DEPT NEUROSCI LA JOLLA CA 92093 CATHOLIC UNIV AMER,DEPT PSYCHOL WASHINGTON DC 20064 OFF NAVAL RES,PERCEPTUAL SCI PROGRAM ARLINGTON VA 22217
Titolo Testata:
Journal of experimental psychology. Human perception and performance
fascicolo: 4, volume: 20, anno: 1994,
pagine: 887 - 904
SICI:
0096-1523(1994)20:4<887:EOSCOL>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; LETTER RECOGNITION ACCURACY; BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; ABRUPT VISUAL ONSETS; SEARCH; DISCRIMINATION; MODULATION; LOCATION; BRAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Citazioni:
74
Recensione:
Indirizzi per estratti:
Citazione:
S.J. Luck et al., "EFFECTS OF SPATIAL CUEING ON LUMINANCE DETECTABILITY - PSYCHOPHYSICALAND ELECTROPHYSIOLOGICAL EVIDENCE FOR EARLY SELECTION", Journal of experimental psychology. Human perception and performance, 20(4), 1994, pp. 887-904

Abstract

Three experiments were conducted to determine whether attention-related changes in luminance detectability reflect a modulation of early sensory processing. Experiments 1 and 2 used peripheral cues to direct attention and found substantial effects of cue validity on target detectability; these effects were consistent with a sensory-level locus of selection but not with certain memory- or decision-level mechanisms. In Experiment 3, event-related brain potentials were recorded in a similar paradigm using central cues, and attention was found to produce changes in sensory-evoked brain activity beginning within the 1st 100 msof stimulus processing. These changes included both an enhancement ofsensory responses to attended stimuli and a suppression of sensory responses to unattended stimuli; the enhancement and suppression effectswere isolated to different neural responses, indicating that they mayarise from independent attentional mechanisms.

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Documento generato il 22/09/20 alle ore 14:20:42