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Frequency and predictability effects on event-related potentials during reading

  • Effects of frequency, predictability, and position of words on event-related potentials were assessed during word-by-word sentence reading in 48 subjects in an early and in a late time window corresponding to P200 and N400. Repeated measures multiple regression analyses revealed a P200 effect in the high-frequency range also the P200 was larger on words at the beginning and end of sentences than on words in the middle of sentences (i.e., a quadratic effect of word position). Predictability strongly affected the N400 component; the effect was stronger for low than for high- frequency words. The P200 frequency effect indicates that high-frequency words are lexically accessed very fast, independent of context information. Effects on the N400 suggest that predictability strongly moderates the late access especially of low-frequency words. Thus, contextual facilitation on the N400 appears to reflect both lexical and post- lexical stages of word recognition, questioning a strict classification into lexical and post-lexical processes.

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Author:Michael Dambacher, Reinhold KlieglORCiDGND, Markus Hofmann, Arthur M. Jacobs
Document Type:Article
Year of first Publication:2006
Year of Completion:2006
Release Date:2017/03/25
Source:Brain research. - ISSN 0006-8993. - 1084 (2006), 21, S. 89 - 103
Organizational units:Humanwissenschaftliche Fakultät / Institut für Psychologie
Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert