Does phonological encoding in speech production always follow the retrieval of semantic knowledge? Electrophysiological evidence for parallel processing.

Full Abstract

In this article a new approach to the distinction between serial/contingent and parallel/independent processing in the human cognitive system is applied to semantic knowledge retrieval and phonological encoding of the word form in picture naming. In two-choice go/nogo tasks pictures of objects were manually classified on the basis of semantic and phonological information. An additional manipulation of the duration of the faster and presumably mediating process (semantic retrieval) allowed to derive differential predictions from the two alternative models. These predictions were tested with two event-related brain potentials (ERPs), the lateralized readiness potential (LRP) and the N200. The findings indicate that phonological encoding can proceed in parallel to the retrieval of semantic features. A suggestion is made how to accommodate these findings with models of speech production.

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Author information

Author/s: Abdel Rahman, Rasha (R); Sommer, Werner (W);

Affiliation: Humboldt University, Berlin, Germany. rasha.abdel-rahman(-atsign-)mpi.nl

Journal and publication information

Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't

Journal: Brain research. Cognitive brain research (Brain Res Cogn Brain Res), published in Netherlands. (Language: eng)

Reference: 2003-May; vol 16 (issue 3) : pp 372-82

Dates: Created 2003/04/22; Completed 2003/06/30; Revised 2006/11/15;

PMID: 12706217, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Male
Memory - physiology
Mental Processes - physiology
Psychomotor Performance - physiology
Reaction Time - physiology
Semantics
Speech - physiology

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