N1 and P2 to words and wordlike stimuli in late elementary school children and adults.
N1 and P2 to words and wordlike stimuli in late elementary school children and adults.
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DOI：
10.1111/psyp.12567
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发表时间：
2016-02
期刊：
影响因子：
3.7
通讯作者：
Meade G
中科院分区：
文献类型：
--
作者：
Coch D;Meade G
在一项调查的发展微调的文字处理在小学后期的事件相关电位波形，第三，第四和第五年级的学生和一个对照组的成年人的后N1和P2组件索引的事件相关电位波形，单词，pseudowords，nonpronouncable字母串，和错误的字体字符串在语义分类任务。在成年人中，N1是较大的，P2是较晚的话相比，pseudowords，一个微调的效果，反映专业化的词汇处理。相反，在每组儿童中，N1对字母串大于假字体串，P2对假字体串大于字母串，反映了正字法的粗编码。在回归分析中，标准化行为测试的正字法知识，解码技能和流畅性的分数预测N1振幅，这些影响并不显着与年龄作为一个单独的预测因素。在包括或不包括年龄的模型中，没有一个行为评分预测P2振幅。在组间直接比较中，儿童组和成人组的N1和P2振幅效应存在多重差异，两个儿童组之间只有一个显著差异。总体而言，研究结果表明，一个漫长的发展过程中的微调早期字处理索引的N1和P2。
In an investigation of the development of fine-tuning for word processing across the late elementary school years as indexed by the posterior N1 and P2 components of the event-related potential waveform, third, fourth, and fifth graders and a comparison group of adults viewed words, pseudowords, nonpronounceble letter strings, and false font strings in a semantic categorization task. In adults, N1 was larger to and P2 was later to words as compared to pseudowords, a finely tuned effect of lexicality reflecting specialization for word processing. In contrast, in each group of children, N1 was larger to letter strings than false font strings and P2 was larger to false font strings than letter strings, reflecting coarse encoding for orthography. In regression analyses, scores on standardized behavioral test measures of orthographic knowledge, decoding skill, and fluency predicted N1 amplitude; these effects were not significant with age included as a separate predictor. None of the behavioral scores, in models including or not including age, predicted P2 amplitude. In direct comparisons between groups, there were multiple differences between the child and adult groups for both N1 and P2 amplitude effects, and only a single significant difference between two child groups. Overall, the findings suggest a lengthy developmental time course for the fine-tuning of early word processing as indexed by N1 and P2.