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Titolo:
Is the target-to-target interval a critical determinant of P3 amplitude?
Autore:
Gonsalvez, CJ; Gordon, E; Grayson, S; Barry, RJ; Lazzaro, I; Bahramali, H;
Indirizzi:
Univ Wollongong, Dept Psychol, Wollongong, NSW 2522, Australia Univ Wollongong Wollongong NSW Australia 2522 ongong, NSW 2522, Australia Westmead Hosp, Dept Psychiat, Westmead, NSW 2145, Australia Westmead HospWestmead NSW Australia 2145 , Westmead, NSW 2145, Australia
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 5, volume: 36, anno: 1999,
pagine: 643 - 654
SICI:
0048-5772(199909)36:5<643:ITTIAC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; STIMULUS SEQUENCE; AUDITORY-STIMULI; REACTION-TIMES; INTERSTIMULUS-INTERVAL; PROBABILITY; COMPONENT; ODDBALL; PSYCHOPHYSIOLOGY; EXPECTANCY;
Keywords:
P3; N1; target-to-target interval; interstimulus interval; sequence effects; event-related potentials;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Gonsalvez, CJ Univ Wollongong, Dept Psychol, Wollongong, NSW 2522, Australia Univ Wollongong Wollongong NSW Australia 2522 22, Australia
Citazione:
C.J. Gonsalvez et al., "Is the target-to-target interval a critical determinant of P3 amplitude?", PSYCHOPHYSL, 36(5), 1999, pp. 643-654

Abstract

The P3 amplitude is augmented by decrements in target-probability, increments in the number of nontargets preceding the target, and extensions of theinterstimulus interval (ISI). Each of these changes prolongs the target-to-target interval (TTI) and, consequently, results attributed to these factors might, at least partially, be accounted for by the TTI. Recent research also indicates that the P3s elicited by targets in one-, two-, and three-stimuli tasks (in which the TTI remains invariant) are similar. However, the TTI has not been examined systematically in previous research. The present study had subjects listen to a randomized ISI (0.5, 1, 2, or 4 s) version of the auditory oddball task in which targets occurred after one, two, three, four, or five nontargets. Event-related potentials were analyzed based onISI, sequential structure, and TTI. The study examined sequence and ISI effects independent of TTI effects and demonstrated that extensions of ISI affected N1 but not P3 amplitude, extensions of TTI enhanced P3 amplitude independent of sequential structure, and sequential structure failed to influence P3 amplitude when TTI was controlled.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 22:40:15