ERP evidence for memory and predictive mechanisms in word-to-text integration.
ERP evidence for memory and predictive mechanisms in word-to-text integration.
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词到文本整合中记忆和预测机制的 ERP 证据。
DOI：
10.1080/23273798.2015.1062119
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Perfetti,CharlesA
中科院分区：
文献类型：
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作者：
Stafura,JosephZ;Rickles,Benjamin;Perfetti,CharlesA
在阅读过程中，单词到文本的整合（WTI）通过预测和记忆过程快速而渐进地进行。本研究利用事件相关电位（event- correlation potential, ERPs）记录跨句子边界的关键词与在词汇关联主导方向上存在差异的共同指称词的预测和记忆机制。为了比较文本理解，参与者对一组匹配的单词对进行意义判断。在这两项任务中，相对于任务特定的基线条件，在中央头皮电极上，与任何方向相关的单词都诱发了N400振幅的降低。ERP数据的时间主成分分析提取了一个反映这个中心N400的成分。此外，对于文本理解任务，早期（N200）和晚期（顶叶N400和P600）区分了前向关联条件和后向关联条件。结果表明，除了N400预测指标外，erp还反映了句子间记忆过程的作用。
During reading, word-to-text integration (WTI) proceeds quickly and incrementally through both prediction and memory processes. We tested predictive and memory mechanisms with event-related potentials (ERPs) recorded on critical words that were across a sentence boundary from co-referential words that differed in dominant direction of lexical association. For comparison of text comprehension, participants performed meaning judgements on a matched set of word pairs. In both tasks, reduced N400 amplitudes were elicited over central scalp electrodes by words associated in either direction relative to task-specific baseline conditions. A temporal principal component analysis of the ERP data extracted a component reflecting this central N400. Additionally, for the text comprehension task early (N200) and late (parietal N400 and P600) discriminated between forward associated and backward associated conditions. The results demonstrate that, beyond N400 indicators of prediction, ERPs reflect the role of memory processes in WTI across sentences.