Oscillatory brain responses in spoken word production reflect lexical frequency and sentential constraint

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Source
Neuropsychologia, 53, (2014), pp. 146-156ISSN
Publication type
Article / Letter to editor

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Organization
SW OZ DCC PL
SW OZ DCC CO
Former Organization
F.C. Donders Centre for Cognitive Neuroimaging
Journal title
Neuropsychologia
Volume
vol. 53
Languages used
English (eng)
Page start
p. 146
Page end
p. 156
Subject
DI-BCB_DCC_Theme 1: Language and Communication; DI-BCB_DCC_Theme 4: Brain Networks and Neuronal Communication; PsycholinguisticsAbstract
Two fundamental factors affecting the speed of spoken word production are lexical frequency and sentential constraint, but little is known about their timing and electrophysiological basis. In the present study, we investigated event-related potentials (ERPs) and oscillatory brain responses induced by these factors, using a task in which participants named pictures after reading sentences. Sentence contexts were either constraining or nonconstraining towards the final word, which was presented as a picture. Picture names varied in their frequency of occurrence in the language. Naming latencies and electrophysiological responses were examined as a function of context and lexical frequency. Lexical frequency is an index of our cumulative learning experience with words, so lexical-frequency effects most likely reflect access to memory representations for words. Pictures were named faster with constraining than nonconstraining contexts. Associated with this effect, starting around 400 ms pre-picture presentation, oscillatory power between 8 and 30 Hz was lower for constraining relative to nonconstraining contexts. Furthermore, pictures were named faster with high-frequency than low-frequency names, but only for nonconstraining contexts, suggesting differential ease of memory access as a function of sentential context. Associated with the lexical-frequency effect, starting around 500 ms pre-picture presentation, oscillatory power between 4 and 10 Hz was higher for high-frequency than for low-frequency names, but only for constraining contexts. Our results characterise electrophysiological responses associated with lexical frequency and sentential constraint in spoken word production,
This item appears in the following Collection(s)
- Academic publications [204968]
- Electronic publications [103219]
- Faculty of Social Sciences [27347]
- Open Access publications [71774]
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