A Thousand Words Are Worth a Picture: Snapshots of Printed-Word Processing in an Event-Related Potential Megastudy.
A Thousand Words Are Worth a Picture: Snapshots of Printed-Word Processing in an Event-Related Potential Megastudy.
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DOI：
10.1177/0956797615603934
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发表时间：
2015-12
影响因子：
8.2
通讯作者：
Holcomb PJ
中科院分区：
文献类型：
--
作者：
Dufau S;Grainger J;Midgley KJ;Holcomb PJ
研究人员向75名参与者展示了大约1000个单词，并记录了事件相关电位（erp）。对于选择的反映正字法、词汇和语义处理的变量，以及书面单词视觉复杂性的新测量，计算了部分相关性。相关性基于每个电极位置和时间片的项目级erp，同时应用错误发现率校正。视觉复杂性的早期影响在单词出现后50毫秒左右出现，随后是最早的持续正字法影响在100-150毫秒左右出现，而大部分正字法和词汇影响在单词出现后200毫秒出现。语义变量（具体性）的影响出现较晚，大约在单词开始后300毫秒。这些ERP效应的总体时间过程与单词识别的分层、级联、交互描述一致，其中快速前馈影响通过循环处理循环的自上而下反馈得到巩固。
Approximately 1000 words were presented to 75 participants in a go/no-go lexical decision task while recording event-related potentials (ERPs). Partial correlations were computed for variables selected to reflect orthographic, lexical, and semantic processing, as well as a novel measure of the visual complexity of written words. Correlations were based on the item-level ERPs at each electrode site and time slice while applying a False Discovery Rate correction. Early effects of visual complexity were seen around 50 ms post-word onset, followed by the earliest sustained orthographic effects around 100-150 ms, and with the bulk of orthographic and lexical influences arising after 200 ms post-word onset. Effects of a semantic variable (concreteness) emerged later, at around 300 ms post-word onset. The overall time-course of these ERP effects is in line with hierarchical, cascaded, interactive accounts of word recognition in which fast feed-forward influences are consolidated by top-down feedback via recurrent processing loops.