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    政大機構典藏 > 理學院 > 心理學系 > 期刊論文 >  Item 140.119/65827
    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/65827


    Title: The time course of contextual effects on visual word recognition
    Authors: 蔡介立
    Lee, Chia-Ying;Liu, Yo-Ning;Tsai, Jie-Li
    Contributors: 心理系
    Keywords: anterior N1;contextual effect;event-related potentials;lexical access;P200
    Date: 2012.08
    Issue Date: 2014-05-06 16:41:04 (UTC+8)
    Abstract: 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. © 2012 Lee, Liu and Tsai.
    Relation: Frontiers in Psychology, 3(285), 1-13
    Data Type: article
    DOI 連結: http://dx.doi.org/10.3389/fpsyg.2012.00285
    DOI: 10.3389/fpsyg.2012.00285
    Appears in Collections:[心理學系] 期刊論文

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