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Semantic processing without conscious identification: Evidence from event-related potentials

Publiceringsår: 2000
Språk: Engelska
Sidor: 973-1004
Publikation/Tidskrift/Serie: Journal of Experimental Psychology: Learning, Memory, & Cognition
Volym: 26
Dokumenttyp: Artikel
Förlag: American Psychological Association

Sammanfattning

Three event-related potential (ERP) experiments examined whether semantic content can be accessed From visually presented words that cannot he consciously identified. Category labels were shown to participants, followed by masked, briefly exposed words that were either exemplars of the category or not exemplars. The task was to verify the category, by guessing if necessary, and to identify the word naming it if possible. Exposure durations were selected to allow identification in approximately half the trials. For identified words, there was a marked difference in the ERP response between in-category and out-of-category words because of an N400 component. For unidentified words, there was a similar although smaller difference. Conscious identification was defined using a variety of approaches: verbal report 6-alternative forced choice, and binary categorization (in the context of the regression method; A. G. Greenwald, M. R. Klinger, & E. S. Schuh, 1995). By any definition, ERPs for unidentified words showed evidence of semantic processing. In addition, there were differences in the neuronal populations recruited to process above-threshold versus below-threshold words, suggesting qualitative differences.

Disputation

Nyckelord

  • Social Sciences
  • VISUAL WORD RECOGNITION
  • UNCONSCIOUS PERCEPTION
  • ASSOCIATIVE ACTIVATION
  • BRAIN POTENTIALS
  • N400
  • LEXICAL DECISION
  • GREENWALD 1998
  • MEMORY
  • CONTEXT
  • STIMULUS ONSET ASYNCHRONIES

Övrigt

Published
Yes
  • ISSN: 0278-7393

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