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Re-evaluating the Time Course of Gender and Phonological Encoding During Silent Monitoring Tasks Estimated by ERP: Serial or Parallel Processing?

Camen, Christian ; Morand, Stéphanie ; Laganaro, Marina

In: Journal of Psycholinguistic Research, 2010, vol. 39, no. 1, p. 35-49

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    Titre
    • Re-evaluating the Time Course of Gender and Phonological Encoding During Silent Monitoring Tasks Estimated by ERP: Serial or Parallel Processing?
    Auteur
    • Camen, Christian. Division of Rehabilitation, University Hospital & University of Geneva, Geneva, Switzerland
    • Morand, Stéphanie. Division of Rehabilitation, University Hospital & University of Geneva, Geneva, Switzerland
    • Laganaro, Marina. Division of Rehabilitation, University Hospital & University of Geneva, Geneva, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Psycholinguistic Research, 2010, vol. 39, no. 1, p. 35-49. Springer US; http://www.springer-ny.com
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:319094
    Summary
    Neurolinguistic and psycholinguistic studies suggest that grammatical (gender) and phonological information are retrieved independently and that gender can be accessed before phonological information. This study investigated the relative time courses of gender and phonological encoding using topographic evoked potentials mapping methods. Event-related brain potentials (ERPs) were recorded using a high resolution electroencephalogram (EEG) system (128 channels) during gender and phoneme monitoring in silent picture naming. Behavioural results showed similar reaction times (RT) between gender and word onset (first phoneme) monitoring, and longer RT when monitoring the second syllable onset. Temporal segmentation analysis (defining dominant map topographies using cluster analysis) revealed no timing difference between gender monitoring and word onset monitoring: both effects fall within the same time window at about 270-290ms after picture presentation. Monitoring a second syllable onset generated a later effect at about 480ms. Direct comparison between gender and first phoneme monitoring revealed a difference of only 10ms between tasks at approximately 200ms. Taken together, these results suggest that lemma retrieval and phonological encoding may proceed in parallel or overlap. Word onset is retrieved simultaneously with gender, while the longer RT and the later ERP effect for second syllable onset reflect that segmental encoding continues incrementally to the following phonemes