Van Petten C, Rheinfelder H
Department of Psychology, University of Arizona, Tuscon, 85721 USA.
Neuropsychologia. 1995 Apr;33(4):485-508. doi: 10.1016/0028-3932(94)00133-a.
Identifiable nonspeech sounds were paired with spoken words. In Experiment 1, words preceded by related sounds yielded faster lexical decision times than those preceded by unrelated sounds. In Experiment 2, subjects were presented with sound/word and word/sound pairs while event-related potentials were recorded. Words preceded by related sounds elicited smaller N400 components than those preceded by unrelated sounds; this N400 context effect was slightly larger at electrode sites over the right hemisphere. A context effect similar in latency and morphology was observed for sounds-a smaller negative wave for related than unrelated sounds. The context effect for sounds was significantly larger at left than right recording sites, suggesting differential hemispheric involvement in the processing of word meanings than the "meanings" of environmental sounds.
可识别的非语音声音与口语单词配对。在实验1中，由相关声音前置的单词比由不相关声音前置的单词产生更快的词汇判断时间。在实验2中，向受试者呈现声音/单词和单词/声音对，同时记录事件相关电位。由相关声音前置的单词比由不相关声音前置的单词诱发的N400成分更小；这种N400语境效应在右半球上方的电极部位略大。在声音方面也观察到了潜伏期和形态相似的语境效应——相关声音比不相关声音诱发的负波更小。声音的语境效应在左侧记录部位比右侧显著更大，这表明在处理单词意义和环境声音的“意义”时，大脑半球的参与存在差异。
