Investigations of the time course of various stages of lexical processing have indicated either early or late onset of brain activation for phonological code retrieval. The basis of the differential findings is unclear, but factors related to segmental phonology appear to be part of it. The purpose of the present study was to determine whether phonological encoding is influenced by consonant type. Undergraduate students were presented pictures of common and familiar objects to name. Each picture label had an initial liquid (/l/, /ɹ /) or a stop (/b/, /d/) consonant. Accuracy of picture naming was high and comparable for the two stimulus sets. However, words beginning with liquids elicited larger N2 ERP responses than did those with initial stops. Cluster permutation analysis indicated that the ERP responses elicited by words in the two stimulus sets differed between 293 ms and 371 ms post picture onset. These findings point to a late onset of phonological code retrieval. They have implications for segmental phonology and/or motor planning and execution of speech.
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机译：对词汇处理各个阶段的时间过程的调查表明，语音编码检索的大脑激活发生的早期或晚期。差异发现的基础尚不清楚，但与节段音系有关的因素似乎是其中的一部分。本研究的目的是确定语音编码是否受辅音类型的影响。向大学生们展示了常见和熟悉的物体的照片。每个图片标签都有一个初始液体（/ l /，/ɹ/）或一个停止符（/ b /，/ d /）辅音。图片命名的准确性很高，并且与两个刺激集相当。但是，以液体开头的单词比起初以单词开头的单词引起的N2 ERP响应更大。聚类排列分析表明，由两个刺激组中的单词引起的ERP响应在图像发作后的293 ms和371 ms之间有所不同。这些发现表明语音编码检索的起步较晚。它们对分段音系和/或运动计划和语音执行具有影响。
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