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Electrophysiological estimates of the time course of semantic and phonological encoding during implicit picture naming

Published online by Cambridge University Press:  01 July 2000

BERNADETTE M. SCHMITT ,
THOMAS F. MÜNTE  and
MARTA KUTAS
BERNADETTE M. SCHMITT
Affiliation:
Faculty of Psychology, Department of Neurocognition, Maastricht University, The Netherlands Department of Cognitive Science and Department of Cognitive Neuroscience, University of California–San Diego, La Jolla, USA
THOMAS F. MÜNTE
Affiliation:
Department of Cognitive Science and Department of Cognitive Neuroscience, University of California–San Diego, La Jolla, USA Department of Neurology, Medizinische Hochschule Hannover, Germany
MARTA KUTAS
Affiliation:
Department of Cognitive Science and Department of Cognitive Neuroscience, University of California–San Diego, La Jolla, USA
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Abstract

Two different event-related potential (ERP) components were used to investigate the temporal processing of semantic and phonological encoding during implicit picture naming. Participants were shown pictures and carried out a dual choice go/nogo decision based on semantic information (i.e., whether the picture was of an object or an animal) and phonological information (i.e., whether the picture's name starts with a vowel or a consonant). In addition to the already established lateralized readiness potential (LRP; related to response preparation), we introduce the N200 (presumably related to response inhibition) as a tool for measuring online language processing. Both, the LRP and the N200 data indicated that semantic processing began earlier than phonological processing. The data are discussed in the context of language production models. Therein, the LRP and N200 results, taken together, favor a serial or cascaded processing model of language production in contrast to a parallel processing account.

Keywords

ERPLRPN200Implicit picture namingLanguage productionTemporal processing of semantic and phonological encoding
Type
Research Article
Information
Psychophysiology , Volume 37 , Issue 4 , July 2000 , pp. 473 - 484
Copyright
2000 Society for Psychophysiological Research

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