Word-specific repetition effects revealed by MEG and the implications for lexical access

Research output: Contribution to journalArticle

Abstract

This magnetoencephalography (MEG) study investigated the early stages of lexical access in reading, with the goal of establishing when initial contact with lexical information takes place. We identified two candidate evoked responses that could reflect this processing stage: the occipitotemporal N170/M170 and the frontocentral P2. Using a repetition priming paradigm in which long and variable lags were used to reduce the predictability of each repetition, we found that (i) repetition of words, but not pseudowords, evoked a differential bilateral frontal response in the 150-250. ms window, (ii) a differential repetition N400m effect was observed between words and pseudowords. We argue that this frontal response, an MEG correlate of the P2 identified in ERP studies, reflects early access to long-term memory representations, which we tentatively characterize as being modality-specific.

Original languageEnglish (US)
Pages (from-to)497-509
Number of pages13
JournalBrain and Language
Volume127
Issue number3
DOIs
StatePublished - Dec 2013

Keywords

  • Episodic memory
  • Lexical access
  • MEG
  • N400
  • P2
  • Repetition priming

ASJC Scopus subject areas

  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language
  • Cognitive Neuroscience
  • Speech and Hearing

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