汉字亚词汇部件语音加工的P200效应

亚词汇加工是词汇识别研究中的一个重要领域，本研究考察了早期ERP成分P200如何受到汉字亚词汇部件语音信息的影响。在ERP实验中，被试对顺序呈现的启动字和目标字对进行语义判断。实验中“启动字-目标字”字对共享一个共同的可发音或不可发音的部件（如“吹-砍”、“扬-场”）。对目标字的P200效应分析显示：与部件不发音的目标字相比，部件可发音的目标字所诱发的P200显著增强。这种增强的ERP效应表明P200对汉字识别中亚词汇部件的语音加工非常敏感，其效应变化受到亚词汇语音的单独调节，同时也表明在汉字识别的早期阶段亚词汇部件语音信息就已被激活并在汉字加工中起重要作用。

The Effect of Sub-Lexical Phonology on P200 in Chinese Word Recognition

Sub-lexical processing is an important topic in word recognition. The present study examined whether or not P200 is modulated by sub-lexical phonological processing in Chinese word recognition. Participants performed a semantic judgment task on prime-target pairs of words matched in frequency, strokes, and consistency. The critical pairs shared a phonetic radical which was either pronounceable or unpronounceable. P200 elicited by the target was significantly larger in the pronounceable condition than the unpronounceable one. Combined with previous findings, the results present clearly evidence that P200 is an ERP marker for sub-lexical phonological processing in Chinese word reading.