名词与动词加工的ERP差异

ERP DIFFERENCE BETWEEN PROCESSING OF NOUNS AND VERBS

采用词汇判断任务和记录ERP的方法 ,探讨了名词与动词之间的差异以及词汇的具体性对这种词性效应的影响。研究结果表明 ,在 2 0 0～ 30 0ms、30 0～ 4 0 0ms(即N4 0 0 )时窗 ,词性与具体性的交互作用在两侧电极上达到显著水平 ,在两半球上具体名词所诱发的ERP比具体动词更负。并且 ,在N4 0 0上词性与电极位置有显著的交互作用 ,名词与动词的差异主要存在于左、右半球的额叶和颞叶。

An experiment was conducted to examine the difference between noun and verb words using ERP measurements and lexical decision task. Results showed that there is significant interaction between word class and word-concreteness between 200～300、300～400ms in lateral sites. Concrete nouns were associated with a more negative ERP than concrete verbs in the two hemispheres. Furthermore, there is significant interaction between word class and electrode site between 300～400ms. ERP differences between nouns and verbs are primarily over frontal lobe and temporal lobe. Our results partly support neurobiological theory of language representation.