PMID: 9445890Jul 1, 1997Paper

Electrophysiological evidence on the time course of semantic and phonological processes in speech production

Journal of Experimental Psychology. Learning, Memory, and Cognition
M van TurennoutC M Brown

Abstract

The temporal properties of semantic and phonological processes in speech production were investigated in a new experimental paradigm using movement-related brain potentials. The main experimental task was picture naming. In addition, a 2-choice reaction go/no-go procedure was included, involving a semantic and a phonological categorization of the picture name. Lateralized readiness potentials (LRPs) were derived to test whether semantic and phonological information activated motor processes at separate moments in time. An LRP was only observed on no-go trials when the semantic (not the phonological) decision determined the response hand. Varying the position of the critical phoneme in the picture name did not affect the onset of the LRP but rather influenced when the LRP began to differ on go and no-go trials and allowed the duration of phonological encoding of a word to be estimated. These results provide electrophysiological evidence for early semantic activation and later phonological encoding.

Citations

Nov 8, 2001·Proceedings of the National Academy of Sciences of the United States of America·W J Levelt
Aug 19, 2003·Psychonomic Bulletin & Review·Elizabeth BatesOvid Tzeng
Feb 13, 2008·BMC Neuroscience·Mart Bles, Bernadette M Jansma
Aug 7, 2008·BMC Neuroscience·Boukje HabetsThomas F Münte
Nov 26, 2013·BMC Neuroscience·Anika ThomasThomas F Münte

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