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Titolo:
STIMULUS CONTEXT DETERMINES P3A AND P3B
Autore:
KATAYAMA J; POLICH J;
Indirizzi:
HOKKAIDO UNIV,FAC EDUC SAPPORO HOKKAIDO 060 JAPAN SCRIPPS CLIN & RES INST,DEPT NEUROPHARMACOL LA JOLLA CA 00000
Titolo Testata:
Psychophysiology
fascicolo: 1, volume: 35, anno: 1998,
pagine: 23 - 33
SICI:
0048-5772(1998)35:1<23:SCDPAP>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; LATE ERP COMPONENTS; CROSSMODAL DIVIDED ATTENTION; COGNITIVE BRAIN POTENTIALS; CHOICE REACTION TASKS; AGE-RELATED-CHANGES; AUDITORY-STIMULI; SOMATOSENSORY STIMULI; RESPONSE PRODUCTION; SCALP DISTRIBUTION;
Keywords:
P300; P3A; P3B; EVENT-RELATED POTENTIAL (ERP); TASK DIFFICULTY; 3-TONE ODDBALL PARADIGM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
66
Recensione:
Indirizzi per estratti:
Citazione:
J. Katayama e J. Polich, "STIMULUS CONTEXT DETERMINES P3A AND P3B", Psychophysiology, 35(1), 1998, pp. 23-33

Abstract

P300 differences for target (.10), nontarget (.10), and standard tones (.80) were assessed using a three-stimulus oddball paradigm in whichparticipants responded only to the target (n = 12). Target/standard (easy or difficult) and nontarget/standard (large or small) pitch differences were manipulated orthogonally. In all conditions, target tones elicited a parietal P300, which was affected only by the target/standard discrimination ease. Nontarget in the easy/large and difficult/small conditions elicited a parietal but smaller P300 than the target but in the easy/small condition elicited similar ERPs to the standard. However, nontarget stimuli in the difficult/large condition elicited an anterior maximum and earlier P300 (P3a) component. The findings suggestthat target P300s are not influenced by the nontarget stimulus configuration, whereas the nontarget P300 outcomes are determined directly by the stimulus context. The theoretical implications are discussed.

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Documento generato il 04/04/20 alle ore 01:48:52