言语产生过程中语义、语音激活的ERP研究

使用ERP技术考察了言语产生过程中语音和语义的激活情况。图片上有3种条件的干扰词,分别与目标图片名称形成3种关系:语义相关,语音相同,语义、语音、字形都不相关。结果显示,当被试执行延迟命名任务(实验1)时,与目标图片名称语义相关和控制条件的波形比语音相关的波形更趋于负向。说明在图片命名过程中语音有明显的促进作用。当要求被试对上述图片进行延迟语义判断任务(实验2)时,与目标图片名称语义相关、语音相关及控制条件的波形之间无明显差异。说明在语义提取过程中没有语音的促进作用。综合实验1和实验2,本研究的结果更倾向于支持独立两阶段模型。

An ERP Study of Semantic and Phonological Activation in Chinese Speech Production

The semantic and phonological activation in Chinese speech production was investigated with the ERP technique.A Chinese character phonic to,semantically related to,or unrelated to the name of a picture was projected on to the picture.When the participants were asked to name the pictures(Experiment 1),it was found that the ERP wave form of pictures with homophonic characters tended less towards the negative than the semantically related and unrelated characters.When the participants performed a nonlinguistic task on the pictures(Experiment2),the ERP wave form of pictures with semantic,phonological,or unrelated characters had no significance.This suggested that the phonological facilitation effect appeared in naming tasks and disappeared in lexical selections.The results of the experiments were consistent with the discrete stage theory.