Yu Luodi, Zeng Jiajing, Wang Suiping, Zhang Yang
Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, South China Normal University, Guangzhou.
School of Psychology, Center for Studies of Psychological Application, and Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, Guangzhou.
J Speech Lang Hear Res. 2021 Dec 13;64(12):4791-4801. doi: 10.1044/2021_JSLHR-21-00037. Epub 2021 Nov 3.
This study aimed to examine whether abstract knowledge of word-level linguistic prosody is independent of or integrated with phonetic knowledge.
Event-related potential (ERP) responses were measured from 18 adult listeners while they listened to native and nonnative word-level prosody in speech and in nonspeech. The prosodic phonology (speech) conditions included disyllabic pseudowords spoken in Chinese and in English matched for syllabic structure, duration, and intensity. The prosodic acoustic (nonspeech) conditions were hummed versions of the speech stimuli, which eliminated the phonetic content while preserving the acoustic prosodic features.
We observed language-specific effects on the ERP that native stimuli elicited larger late negative response (LNR) amplitude than nonnative stimuli in the prosodic phonology conditions. However, no such effect was observed in the phoneme-free prosodic acoustic control conditions.
The results support the integration view that word-level linguistic prosody likely relies on the phonetic content where the acoustic cues embedded in. It remains to be examined whether the LNR may serve as a neural signature for language-specific processing of prosodic phonology beyond auditory processing of the critical acoustic cues at the suprasyllabic level.
本研究旨在探究词级语言韵律的抽象知识是否独立于语音知识或与语音知识相结合。
对18名成年听众在听语音和非语音中的母语和非母语词级韵律时的事件相关电位（ERP）反应进行测量。韵律音系学（语音）条件包括以中文和英文说出的双音节假词，这些假词在音节结构、时长和强度上相匹配。韵律声学（非语音）条件是语音刺激的哼唱版本，其消除了语音内容，同时保留了声学韵律特征。
我们观察到ERP上的语言特异性效应，即在韵律音系学条件下，母语刺激比非母语刺激引发更大的晚期负向反应（LNR）振幅。然而，在无音素的韵律声学对照条件下未观察到这种效应。
结果支持整合观点，即词级语言韵律可能依赖于其中嵌入声学线索的语音内容。超音节水平上关键声学线索的听觉处理之外，LNR是否可作为韵律音系学语言特异性处理的神经标志仍有待研究。
