An event-related brain potential analysis of visual word priming effects
An event-related brain potential analysis of visual word priming effects
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DOI：
10.1006/brln.1999.2284
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发表时间：
2000-04-01
影响因子：
2.5
通讯作者：
Chwilla, DJ
中科院分区：
文献类型：
--
作者：
Brown, CM;Hagoort, P;Chwilla, DJ
本文通过两个实验，在启动-目标语义启动范式下，研究了视觉词汇加工过程中的tack诱发效应。本研究通过操纵语义相关词对和语义无关词对的比例来考察目标期望效应。实验一采用词汇判断任务，测量反应时和事件相关脑电位。在实验2中，受试者安静地阅读刺激，没有任何额外的任务要求，ERPs被记录。实验一的反应时和事件相关电位结果表明，当呈现高比例的相关词对时，期望机制有助于启动效应。实验二的ERP结果表明，在没有外部任务要求的情况下，期望机制不活跃。然而，在实验2中获得了标准的ERP语义启动效应。综合以上结果，我们发现由关联度比例引起的启动效应是由任务要求引起的，并不是在线词汇加工的一个标准方面。(C)北京大学出版社.
Two experiments are reported that provide evidence on tack-induced effects during visual lexical processing in a prime-target semantic priming paradigm. The research focuses on target expectancy effects by manipulating the proportion of semantically related and unrelated word pairs. In Experiment 1, a lexical decision task was used and reaction times (RTs) and event-related brain potentials (ERPs) were obtained. In Experiment 2, subjects silently read the stimuli, without any additional task demands, and ERPs were recorded. The RT and ERP results of Experiment 1 demonstrate that an expectancy mechanism contributed to the priming effect when a high proportion of related word pairs was presented. The ERP results of Experiment 2 show that in the absence of extraneous task requirements, an expectancy mechanism is not active. However, a standard ERP semantic priming effect was obtained in Experiment 2. The combined results show that priming effects due to relatedness proportion are induced by task demands and are not a standard aspect of online lexical processing. (C) 2000 Academic Press.