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Titolo:
An electrophysiological index of stimulus unfamiliarity
Autore:
Daffner, KR; Mesulam, MM; Scinto, LFM; Calvo, V; Faust, R; Holcomb, PJ;
Indirizzi:
Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Cognit & Behav Neurol,Lab Higher Cort Funct, Boston, MA 02115 USA Harvard Univ Boston MA USA 02115 Higher Cort Funct, Boston, MA 02115 USA Harvard Univ, Sch Med, Brigham Behav Neurol Grp, Boston, MA 02115 USA Harvard Univ Boston MA USA 02115 m Behav Neurol Grp, Boston, MA 02115 USA Northwestern Univ, Sch Med, Ctr Behav & Cognit Neurol, Chicago, IL 60611 USA Northwestern Univ Chicago IL USA 60611 gnit Neurol, Chicago, IL 60611 USA Tufts Univ, Dept Psychol, Medford, MA 02155 USA Tufts Univ Medford MA USA02155 Univ, Dept Psychol, Medford, MA 02155 USA
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 6, volume: 37, anno: 2000,
pagine: 737 - 747
SICI:
0048-5772(200011)37:6<737:AEIOSU>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; VISUAL-STIMULI; INTRACEREBRAL POTENTIALS; EVOKED-POTENTIALS; BRAIN POTENTIALS; RARE TARGET; AUDITORY-STIMULI; NOVELTY; ATTENTION; PICTURES;
Keywords:
ERPs; novelty processing; stimulus unfamiliarity; stimulus deviance; N2; P3;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Daffner, KR Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Cognit & Behav Neurol,Lab Higher Cort Funct, 221 Longwood Ave, Boston, MA 02115 USA Harvard Univ 221 Longwood Ave Boston MA USA 02115 MA 02115 USA
Citazione:
K.R. Daffner et al., "An electrophysiological index of stimulus unfamiliarity", PSYCHOPHYSL, 37(6), 2000, pp. 737-747

Abstract

This study investigated the functional significance of the N2 response to novel stimuli. In one condition, background, target, and deviant stimuli were simple geometric figures. In a second condition, all stimulus types wereunfamiliar/unusual figures. In a third condition, background and target stimuli were unusual figures and deviant stimuli were simple shapes. Unusual figures, whether they were deviant, target, or background stimuli, evoked larger N2 responses than their simple, familiar counterparts. N2 elicited byan unusual background stimulus was larger than that evoked by simple, deviant stimuli, a pattern opposite that exhibited by the subsequent P3. Deviance from immediate context had limited influence over N2 amplitude. The results suggest that novelty N2 and novelty P3 reflect the processing of different aspects of "novel" visual stimuli. The novelty P3 is particularly sensitive to deviation from immediate context. In contrast, the novelty N2 is sensitive to deviation from long-term context that readers a stimulus unfamiliar and difficult to encode.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/04/20 alle ore 02:55:13