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Titolo:
Does a warning signal accelerate the processing of sensory information? Evidence from recognition potential responses to high and low frequency words
Autore:
Rudell, AP; Hu, B;
Indirizzi:
SUNY Hlth Sci Ctr, Dept Physiol & Pharmacol, Brooklyn, NY 11203 USA SUNY Hlth Sci Ctr Brooklyn NY USA 11203 Pharmacol, Brooklyn, NY 11203 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY
fascicolo: 1, volume: 41, anno: 2001,
pagine: 31 - 42
SICI:
0167-8760(200105)41:1<31:DAWSAT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; MENTAL CHRONOMETRY; BRAIN POTENTIALS; REACTION-TIME; P300 LATENCY; LEXICAL ACCESS; ERP ANALYSIS; REPETITION; STIMULUS; TASK;
Keywords:
recognition potential; P3; N400; perception; foreperiod; motor preparation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
70
Recensione:
Indirizzi per estratti:
Indirizzo: Rudell, AP SUNY Hlth Sci Ctr, Dept Physiol & Pharmacol, 450 Clarkson Ave, Brooklyn, NY 11203 USA SUNY Hlth Sci Ctr 450 Clarkson Ave Brooklyn NY USA 11203 03 USA
Citazione:
A.P. Rudell e B. Hu, "Does a warning signal accelerate the processing of sensory information? Evidence from recognition potential responses to high and low frequency words", INT J PSYCP, 41(1), 2001, pp. 31-42

Abstract

Electrophysiological and behavioral data were obtained in 12 subjects who detected valid words in a background stream of random letter strings. Behavioral reaction time (RT) showed significant effects of warning signal presentation and the frequency of word usage in printed literature. Cross-correlation functions were used to estimate delays of electrophysiological responses. The critical response was the recognition potential (RP). The RP is a response of the brain that occurs when a person views recognizable images, such as words, pictures, or faces. Its latency is usually less than 300 ms. Both the RP and longer latency activity occurring at approximately 400-600ms were delayed more for low than for high frequency words. The longer latency responses showed shorter delay if a warning signal was presented, but the RP did not. The results supported the idea that a non-informative warning signal decreases RT by altering response-related processes without facilitating sensory processes. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 01/04/20 alle ore 20:24:45