Yin Shuqi, Xie Lang, Ma Yunxiao, Yu Keke, Wang Ruiming
Philosophy and Social Science Laboratory of Reading and Development in Children and Adolescents, Ministry of Education, & Center for Studies of Psychological Application, School of Psychology, South China Normal University, Guangzhou 510631, China.
Brain Sci. 2023 Jan 23;13(2):192. doi: 10.3390/brainsci13020192.
The speaker's identity (who the speaker is) and linguistic information (what the speaker is saying) are essential to daily communication. However, it is unclear whether and how listeners process the two types of information differently in speech perception. The present study adopted a passive oddball paradigm to compare the identity and linguistic information processing concerning neural resource involvements and hemispheric lateralization patterns. We used two female native Mandarin speakers' real and pseudo-Mandarin words to differentiate the identity from linguistic (phonological and lexical) information. The results showed that, in real words, the phonological-lexical variation elicited larger MMN amplitudes than the identity variation. In contrast, there were no significant MMN amplitude differences between the identity and phonological variation in pseudo words. Regardless of real or pseudo words, the identity and linguistic variation did not elicit MMN amplitudes differences between the left and right hemispheres. Taken together, findings from the present study indicated that the identity information recruited similar neural resources to the phonological information but different neural resources from the lexical information. However, the identity and linguistic information processing did not show a particular hemispheric lateralization pattern at an early pre-attentive speech perception stage. The findings revealed similarities and differences between linguistic and non-linguistic information processing, contributing to a better understanding of speech perception and spoken word recognition.
说话者的身份（说话者是谁）和语言信息（说话者在说什么）对于日常交流至关重要。然而，目前尚不清楚听众在言语感知过程中是否以及如何以不同方式处理这两种类型的信息。本研究采用被动失匹配负波范式，以比较关于神经资源参与和半球侧化模式的身份信息与语言信息处理。我们使用了两位以普通话为母语的女性的真实和伪普通话单词，以区分身份信息与语言（音系和词汇）信息。结果表明，在真实单词中，音系 - 词汇变化比身份变化引发更大的失匹配负波幅值。相比之下，在伪单词中，身份变化与音系变化之间的失匹配负波幅值没有显著差异。无论真实单词还是伪单词，身份信息与语言变化在左右半球之间均未引发失匹配负波幅值差异。综上所述，本研究结果表明，身份信息与音系信息募集了相似的神经资源，但与词汇信息募集的神经资源不同。然而，在早期的前注意言语感知阶段，身份信息与语言信息处理并未表现出特定的半球侧化模式。这些发现揭示了语言信息与非语言信息处理之间的异同，有助于更好地理解言语感知和口语单词识别。
