Stockholm University, Ellen Marklund, Department of Linguistics, SE-106 91, Stockholm, Sweden.
Stockholm University, Ellen Marklund, Department of Linguistics, SE-106 91, Stockholm, Sweden.
Dev Cogn Neurosci. 2019 Apr;36:100622. doi: 10.1016/j.dcn.2019.100622. Epub 2019 Jan 31.
During the first year of life, infants shift their focus in speech perception from acoustic to linguistic information. This perceptual reorganization is related to exposure, and a direct relation has previously been demonstrated between amount of daily language exposure and mismatch response (MMR) amplitude to a native consonant contrast at around one year of age. The present study investigates the same relation between amount of speech exposure and MMR amplitude to a native vowel contrast at four to eight months of age. Importantly, the present study uses spectrally rotated speech in an effort to take general neural maturation into account. The amplitude of the part of the MMR that is tied specifically to speech processing correlates with amount of daily speech exposure, as estimated using the LENA system.
在生命的第一年，婴儿会将其在言语感知中的焦点从声学信息转移到语言信息。这种感知重组与暴露有关，并且之前已经证明，每天的语言暴露量与大约一岁时对母语辅音对比的不匹配响应（MMR）幅度之间存在直接关系。本研究调查了在四个月至八个月大时，对母语元音对比的 MMR 幅度与语音暴露量之间的相同关系。重要的是，本研究使用频谱旋转的语音来努力考虑一般神经成熟。MMR 中与言语处理特别相关的部分的幅度与使用 LENA 系统估计的每日言语暴露量相关。
