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| Research article summary (published 30 Aug 2002): |
Electrophysiological evidence for the efficiency of spoken word processing.
Full Abstract
The Cohort model (Marslen-Wilson, Spoken Word Recognition, MIT Press, Cambridge, MA, 1987, pp. 71-103) proposes that spoken words are frequently recognized at the first point in the acoustic signal where a unique lexical representation is specified. This proposal was tested in two experiments. In experiment 1 participants made speeded lexical decisions to spoken words and pseudowords. In experiment 2 participants passively listened without making overt responses. In both experiments the recognition points for words (the point past which no other lexical item was consistent with the acoustic signal) and deviation points for pseudowords (the point past which no real word is compatible with the acoustic signal) were manipulated. An ERP negativity in the region of the N400 component and RT occurred sooner for items with early than late recognition/deviation points when measures were time-locked to stimulus onset. In experiment 1, when time-locking was to recognition/deviation points, early and late words produced N400s and RTs with indistinguishable latencies, while late pseudowords produced faster RTs and earlier N400s than early pseudowords. Experiment 2 replicated the N 400 effects for words, but only produced a trend in the same direction as experiment 1 for pseudowords.
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Author information
Author/s: O'Rourke, Timothy B (TB); Holcomb, Phillip J (PJ);
Affiliation: Tufts University, 490 Boston Avenue, Medford, MA 02155, USA.
Grants: HD25889 (Agency:United States NICHD)
Journal and publication information
Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S.
Journal: Biological psychology (Biol Psychol), published in Netherlands. (Language: eng)
Reference: 2002-Sep; vol 60 (issue 2-3) : pp 121-50
Dates: Created 2002/09/24; Completed 2002/12/04; Revised 2007/11/14;
PMID: 12270588, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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