词汇识别中歧义词素语义加工:ERP研究

发布时间：2019-01-06 20:39

【摘要】：结合掩蔽启动范式和ERP技术,利用歧义词素的加工,本研究探讨了歧义词素语义的激活。实验采用3×2两因素被试内设计,歧义词素两含义互为启动刺激和目标刺激,两变量分别为启动词类型(歧义词素含义1 vs.含义2 vs.无关词)和目标词类型(歧义词素含义1 vs.含义2)。行为结果发现启动词类型和目标词类型存在交互作用,即只有当共享词素同形同义的情况下,目标词的加工才可能被启动,共享词素同形不同义时并没有产生启动效应。ERP结果进一步肯定了行为结果,在N250和N400两个脑电成分上都发现了启动类型和目标类型交互作用有关的效应,当启动词和目标词共享词素同形同义时,同时引发了N250和N400的变化;当共享词素同形不同义时,时程分析时虽然也发现了N250的变化,但是N250的效应较小,小于同形同义所引发的N250效应,持续时间也较短。实验结果说明,在词汇识别中歧义词素语义可以激活,并对目标词汇加工的早期加工阶段发挥作用。
[Abstract]:Based on the masking priming paradigm and ERP technique, the semantic activation of ambiguous morphemes is investigated by using the processing of ambiguous morphemes. The experiment was designed with 3 脳 2 factors. The meanings of ambiguous morpheme were priming stimulus and target stimulus, and the two variables were priming word type (ambiguous morpheme meaning 1 vs.). Implication 2 vs. Irrelevant word and target word type (ambiguous morpheme 1 vs.) Meaning 2). The behavior results show that there is interaction between the priming word type and the target word type, that is, the processing of the target word can only be initiated when the morpheme is shared with the same meaning. There was no priming effect when sharing morpheme isomorphism. The ERP results further confirmed the behavioral results, and the effects related to the interaction between the priming type and the target type were found in both N250 and N400 EEG components. When the initiator word and the target word share morpheme synonyms, the changes of N250 and N400 are initiated at the same time. Although the change of N250 is also found in time history analysis, the effect of N250 is smaller than that of N250 induced by synonym, and the duration is shorter. The experimental results show that ambiguous morpheme semantics can be activated in lexical recognition and play an important role in the early processing stage of target lexical processing.
【作者单位】：东北师范大学心理学院;
【基金】：国家自然科学基金项目(31500878)
【分类号】：B842

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