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Titolo:
AN EVENT-RELATED POTENTIAL STUDY OF SEMANTIC CONGRUITY AND REPETITIONIN A SENTENCE-READING TASK - EFFECTS OF CONTEXT CHANGE
Autore:
MITCHELL PF; ANDREWS S; WARD PB;
Indirizzi:
UNIV NEW S WALES,SCH PSYCHOL KENSINGTON NSW 2033 AUSTRALIA UNIV NEW S WALES,SCH PSYCHOL KENSINGTON NSW 2033 AUSTRALIA UNIV NEW S WALES,SCH PSYCHIAT KENSINGTON NSW 2033 AUSTRALIA
Titolo Testata:
Psychophysiology
fascicolo: 5, volume: 30, anno: 1993,
pagine: 496 - 509
SICI:
0048-5772(1993)30:5<496:AEPSOS>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
WORD REPETITION; BRAIN POTENTIALS; RECOGNITION MEMORY; LEXICAL DECISION; SPREADING ACTIVATION; FREQUENCY WORDS; MODEL; IDENTIFICATION; MODULATION; FRAMEWORK;
Keywords:
N400; LATE POSITIVE COMPONENT; SEMANTIC PRIMING; REPETITION PRIMING; SENTENCE CONTEXT; ABSTRACT REPRESENTATIONS; CONTEXT-SPECIFIC EPISODIC REPRESENTATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
68
Recensione:
Indirizzi per estratti:
Citazione:
P.F. Mitchell et al., "AN EVENT-RELATED POTENTIAL STUDY OF SEMANTIC CONGRUITY AND REPETITIONIN A SENTENCE-READING TASK - EFFECTS OF CONTEXT CHANGE", Psychophysiology, 30(5), 1993, pp. 496-509

Abstract

This experiment examined the joint effects of semantic congruity and repetition on event-related brain potentials (ERPs) elicited in a sentence priming task. In an initial training phase, subjects were familiarized with a list of 60 congruous and incongruous sentences. During the second phase, ERPs were recorded as subjects silently read a set of 180 unconnected sentences. One third of the sentences were presented exactly as they had been seen in training (Old sentences), one third were presented for the first time (Completely New sentences), and one third involved a re-pairing of the frames and completions of the congruous and incongruous Old sentences (New Pair sentences). The N400 congruity effect was reduced for Old as compared with Completely New and NewPair sentence completions. These results suggest that N400 reflects processes that are sensitive to both existing semantic associations andrepresentations of previous episodes that include the context of the eliciting stimulus. A late positive component (LPC) involving a sustained positive shift in the waveform after 600 ms was largest for incongruous completions and occurred somewhat earlier for Old sentences. This pattern of results is consistent with the notion that the LPC is an index of episodic retrieval and elaborative processes. The data also suggest the presence of an early onset slow positive shift that is onlyevident for New Pair congruous sentences.

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Documento generato il 08/07/20 alle ore 07:47:03