Parafoveal versus foveal N400s dissociate spreading activation from contextual fit
Parafoveal versus foveal N400s dissociate spreading activation from contextual fit
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DOI：
10.1097/wnr.0b013e328332c4f4
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发表时间：
2009-12-09
期刊：
影响因子：
1.7
通讯作者：
Schlesewsky, Matthias
中科院分区：
文献类型：
--
作者：
Kretzschmar, Franziska;Bornkessel-Schlesewsky, Ina;Schlesewsky, Matthias
本研究采用同步脑电和眼动测量跟踪自然阅读，表明反映可预测性的N400效应与由于扩散激活引起的N400效应是分离的。在比较预测的句子结尾与相关和不相关的反义词结构中的未预测的结尾（“黑色的反义词是白色/黄色/不错”）时，关键词的注视相关电位显示了基于可预测性的N400效应（未预测的与预测的词）。相比之下，事件相关电位的时间锁定到最后一个固定之前的关键字显示N400只为无关的不可预测的条件（好）。这种效应归因于关键词和预激活词汇特征（即预测词及其关联词的特征）之间的旁匹配不匹配。除了提供第一次示范的paraferialally诱导N400的效果，我们的研究结果支持的观点，N400最好被视为一个组成部分的家庭。NeuroReport 20：1613-1618（C）2009 Wolters Kluwer Health竖条Lippincott威廉姆斯& Wilkins.
Using concurrent electroencephalogram and eye movement measures to track natural reading, this study shows that N400 effects reflecting predictability are dissociable from those owing to spreading activation. In comparing predicted sentence endings with related and unrelated unpredicted endings in antonym constructions ('the opposite of black is white/yellow/nice'), fixation-related potentials at the critical word revealed a predictability-based N400 effect (unpredicted vs. predicted words). By contrast, event-related potentials time locked to the last fixation before the critical word showed an N400 only for the nonrelated unpredicted condition (nice). This effect is attributed to a parafoveal mismatch between the critical word and preactivated lexical features (i.e. features of the predicted word and its associates). In addition to providing the first demonstration of a parafoveally induced N400 effect, our results support the view that the N400 is best viewed as a component family. NeuroReport 20:1613-1618 (C) 2009 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.