The time course of contextual effects on visual word recognition

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題名:	The time course of contextual effects on visual word recognition
作者:	李佳穎;Lee, Chia-Ying;Liu, Yo-Ning;Tsai, Jie-Li
貢獻者:	生醫理工學院認知神經科學研究所
關鍵詞:	Anterior N1;contextual effect;Event Related Potentials;lexical access;P200;Psychology
日期:	2012-10-10
上傳時間:	2026-04-23 14:46:08 (UTC+8)
出版者:	Frontiers Media S.A.;Switzerland: Frontiers Research Foundation
摘要:	摘要： Sentence comprehension depends on continuous prediction of upcoming words. However, when and how contextual information affects the bottom-up streams of visual word recognition is unknown. This study examined the effects of word frequency and contextual predictability (cloze probability of a target word embedded in the sentence) on N1, P200, and N400 components, which are related to various cognitive operations in early visual processing, perceptual decoding, and semantic processing. The data exhibited a significant interaction between predictability and frequency at the anterior N1 component. The predictability effect, in which the low predictability words elicited a more negative N1 than high predictability words, was only observed when reading a high frequency word. A significant predictability effect occurred during the P200 time window, in which the low predictability words elicited a less positive P200 than high predictability words. There is also a significant predictability effect on the N400 component; low predictability words elicited a greater N400 than high predictability words, although this effect did not interact with frequency. The temporal dynamics of the manner in which contextual information affects the visual word recognition is discussed. These findings support the interactive account, suggesting that contextual information facilitates visual-feature and orthographic processing in the early stage of visual word processing and semantic integration in the later stage. 其他題名： Front Psychol 出版者： Switzerland: Frontiers Research Foundation 出版日期： 2012-01-01 出處： Frontiers in psychology, 2012-01, Vol.3, p.285 資源來源： PubMed Central Open Access 版權： Copyright © 2012 Lee, Liu and Tsai. 2012 識別號： ISSN: 1664-1078 識別號： EISSN: 1664-1078 識別號： DOI: 10.3389/fpsyg.2012.00285 識別號： PMID: 22934087
顯示於類別:	[認知與神經科學研究所 ] 期刊論文

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