SEMANTIC PRIMING AND STIMULUS DEGRADATION - IMPLICATIONS FOR THE ROLE OF THE N400 IN LANGUAGE PROCESSING
SEMANTIC PRIMING AND STIMULUS DEGRADATION - IMPLICATIONS FOR THE ROLE OF THE N400 IN LANGUAGE PROCESSING
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DOI：
10.1111/j.1469-8986.1993.tb03204.x
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发表时间：
1993-01-01
期刊：
影响因子：
3.7
通讯作者：
HOLCOMB, PJ
中科院分区：
文献类型：
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作者：
HOLCOMB, PJ
两个实验探讨了刺激降级对语义启动的行为和事件相关电位（ERP）测量的影响。主要目的是帮助阐明N400成分背后的心理过程。在这两个实验中，受试者作出快速的词汇决定的话和伪词之前，无论是语义相关或不相关的素词。在一组试验中，目标刺激是完整的，在第二组中，它们通过去除构成目标的每个字母的随机33%的元素（实验1）或通过在目标上覆盖点矩阵（实验2）来降解。在这两个实验中，受试者对相关目标的反应比对无关目标的反应更快、更准确（行为语义启动效应），并且当目标被降级时，这种启动效应更大。然而，虽然N400组件是较大的无关比相关的目标（ERP语义启动效应），有没有证据表明，这种差异较大的降级块的实验。这些结果表明，行为和ERP的措施，在这里报告似乎是挖掘到不同的组件的过程（ES）参与语义启动。N400的语言过程的结果的影响进行了讨论。
Two experiments explored the effects of stimulus degradation on behavioral and event-related potential (ERP) measures of semantic priming. The primary goal was to help elucidate the psychological processes that underlie the N400 component. In both experiments, subjects made speeded lexical decisions to words and pseudowords preceded by either semantically related or-unrelated prime words. In one block of trials, the target stimuli were intact, and in a second block they were degraded by removing a random 33% of the elements making up each letter of the target (Experiment 1) or by overlaying a matrix of dots on the target (Experiment 2). In both experiments, subjects responded faster and more accurately to related targets than to unrelated targets (behavioral semantic priming effect), and this priming effect was greater when the target was degraded. However, although the N400 component was larger for unrelated than related targets (ERP semantic priming effect), there was no evidence that this difference was larger in the degraded block of either experiment. These results indicate that the behavioral and ERP measures reported here appear to be tapping into different components of the process(es) involved in semantic priming. The implication of the results for the linguistic processes underlying the N400 are discussed.