Neural Indices of Vowel Discrimination in Monolingual and Bilingual Infants and Children.
Neural Indices of Vowel Discrimination in Monolingual and Bilingual Infants and Children.
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单语和双语婴儿和儿童元音辨别的神经指数。
DOI：
10.1097/aud.0000000000000726
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发表时间：
2019
期刊：
影响因子：
3.7
通讯作者：
Shafer,ValerieL
中科院分区：
文献类型：
--
作者：
Yu,YanH;Tessel,Carol;Han,Henry;Campanelli,Luca;Vidal,Nancy;Gerometta,Jennifer;Garrido-Nag,Karen;Datta,Hia;Shafer,ValerieL
目的：研究婴儿至4岁儿童对英语元音的神经辨别反应的成熟度，以及生物因素(年龄、性别)和经验因素(西班牙语和英语的输入量)对言语神经辨别的调节作用。设计：以事件相关电位失配反应(MMR)为指标，对3个月至47个月大的婴幼儿和儿童的美式英语元音[ε]和[i]进行辨别。共收集了98名儿童的168个纵向和横断面数据集(西班牙语-英语双语：47名男性和31名女性；单语英语：48名男性和42名女性)。收集了语言暴露和其他语言测量数据。事件相关电位反应在早期时间窗(160~360毫秒，早期MMR)和晚期时间窗(400~600毫秒，晚期MMR)进行检测。语言经验和性别也影响了eMMR的幅度。具体而言，双语儿童，尤其是双语女性，与单语儿童和男性相比，表现出更多的消极eMMR。然而，与那些接触西班牙语比英语更多的双语儿童相比(根据照顾者的报告)，双语儿童的eMMR表现出与单语同龄人相似的幅度。年龄是影响晚期MMR波幅的唯一因素。年龄较大儿童的晚期MMR为负值，而双语组和单语组之间差异无统计学意义。结论：与以往的研究结果一致，我们的研究结果表明，生物学因素(年龄和性别)和语言经验调节了幼儿eMMR的波幅。早期的负性MMR很可能是在年龄较大的儿童和成年人中发现的不匹配负性。相反，晚期MMR波幅只受年龄的影响，可能相当于婴儿的NC和在一些听觉被动古怪设计中观察到的晚期负波。
Objectives:To examine maturation of neural discriminative responses to an English vowel contrast from infancy to 4 years of age and to determine how biological factors (age and sex) and an experiential factor (amount of Spanish versus English input) modulate neural discrimination of speech.Design:Event-related potential (ERP) mismatch responses (MMRs) were used as indices of discrimination of the American English vowels [ε] versus [I] in infants and children between 3 months and 47 months of age. A total of 168 longitudinal and cross-sectional data sets were collected from 98 children (Bilingual Spanish–English: 47 male and 31 female sessions; Monolingual English: 48 male and 42 female sessions). Language exposure and other language measures were collected. ERP responses were examined in an early time window (160 to 360 msec, early MMR [eMMR]) and late time window (400 to 600 msec, late MMR).Results:The eMMR became more negative with increasing age. Language experience and sex also influenced the amplitude of the eMMR. Specifically, bilingual children, especially bilingual females, showed more negative eMMR compared with monolingual children and with males. However, the subset of bilingual children with more exposure to English than Spanish compared with those with more exposure to Spanish than English (as reported by caretakers) showed similar amplitude of the eMMR to their monolingual peers. Age was the only factor that influenced the amplitude of the late MMR. More negative late MMR was observed in older children with no difference found between bilingual and monolingual groups.Conclusions:Consistent with previous studies, our findings revealed that biological factors (age and sex) and language experience modulated the amplitude of the eMMR in young children. The early negative MMR is likely to be the mismatch negativity found in older children and adults. In contrast, the late MMR amplitude was influenced only by age and may be equivalent to the Nc in infants and to the late negativity observed in some auditory passive oddball designs.