THE N400 AS A FUNCTION OF THE LEVEL OF PROCESSING
THE N400 AS A FUNCTION OF THE LEVEL OF PROCESSING
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DOI：
10.1111/j.1469-8986.1995.tb02956.x
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发表时间：
1995-05-01
期刊：
影响因子：
3.7
通讯作者：
HAGOORT, P
中科院分区：
文献类型：
--
作者：
CHWILLA, DJ;BROWN, CM;HAGOORT, P
在语义启动实验范式中，通过改变任务要求来考察不同加工水平对N400的影响。在词汇判断任务中，受试者必须区分单词和非单词，在物理任务中，受试者必须区分字母和字母。相关与不相关的词对的比例不同的条件。反应时的词汇性测试表明，物理任务进行非词汇。此外，语义启动反应时效应只在词汇判断任务中出现。加工水平明显影响事件相关电位。N400启动效应只在词汇判断任务中出现。与此相反，在物理任务的P300效应，观察相关或不相关的目标，这取决于他们的发生频率。两者合计，结果表明，N400启动效应，只有当任务的执行引起的语义方面的话，成为情节的刺激事件的痕迹的一部分。
In a semantic priming paradigm, the effects of different levels of processing on the N400 were assessed by changing the task demands. In the lexical decision task, subjects had to discriminate between words and nonwords, and in the physical task, subjects had to discriminate between uppercase and lowercase letters. The proportion of related versus unrelated word pairs differed between conditions. A lexicality test on reaction times demonstrated that the physical task was performed nonlexically. Moreover, a semantic priming reaction time effect was obtained only in the lexical decision task. The level of processing clearly affected the event-related potentials. An N400 priming effect was only observed in the lexical decision task. In contrast, in the physical task a P300 effect was observed for either related or unrelated targets, depending on their frequency of occurrence. Taken together, the results indicate that an N400 priming effect is only evoked when the task performance induces the semantic aspects of words to become part of an episodic trace of the stimulus event.