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Titolo:
Differences in semantic category priming in the left and right cerebral hemispheres under automatic and controlled processing conditions
Autore:
Collins, M;
Indirizzi:
Murdoch Univ, Sch Psychol, Murdoch, WA 6150, Australia Murdoch Univ Murdoch WA Australia 6150 ychol, Murdoch, WA 6150, Australia
Titolo Testata:
NEUROPSYCHOLOGIA
fascicolo: 9, volume: 37, anno: 1999,
pagine: 1071 - 1085
SICI:
0028-3932(199908)37:9<1071:DISCPI>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEXICAL DECISION TASK; SPREADING ACTIVATION; PRESENTATIONS; ORIENTATION; INHIBITION; RETRIEVAL; ATTENTION; MEANINGS; WORDS;
Keywords:
cerebral hemispheres; priming; semantic category; automatic processing; controlled processing; semantic memory;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Collins, M Murdoch Univ, Sch Psychol, Murdoch, WA 6150, Australia Murdoch Univ Murdoch WA Australia 6150 och, WA 6150, Australia
Citazione:
M. Collins, "Differences in semantic category priming in the left and right cerebral hemispheres under automatic and controlled processing conditions", NEUROPSYCHO, 37(9), 1999, pp. 1071-1085

Abstract

The contribution of each cerebral hemisphere to the generation of semanticcategory meanings at automatic and strategic levels of processing was investigated in a priming experiment where prime and target words were independently projected to the left or right visual fields (LVF or RVF). Non-associated category exemplars were employed as related pairs in a lexical decision task and presented in two experimental conditions. The first condition was designed to elicit automatic processing, so related pairs comprised 20% of the positive set, stimulus pairs were temporally separated by a stimulus onset asynchrony (SOA) of 250 ms, and there was no allusion to the presenceof related pairs in the instructions to subjects. The second condition, designed to invoke controlled processing, incorporated a relatedness proportion of 50%, stimulus pairs separated by an SOA of 750 ms, and instructions which informed subjects of the presence and use of category exemplar pairs in the stimulus set. In the first condition, a prime directed to either visual field facilitated responses to categorically related targets subsequently projected to the RVF, while in the second condition a prime directed to either visual field facilitated responses to related targets projected to the LVF. The facilitation effects obtained in both conditions appeared to reflect automatic processes, while strategic processes were invoked in the left, but not the right hemisphere in the second condition. The results suggest that both hemispheres have automatic access to semantic category meanings, although the timecourse of activation of semantic category meanings is slower in the right hemisphere than in the left. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 12:49:49