Bilingual language learning: An ERP study relating early brain responses to speech, language input, and later word production
Bilingual language learning: An ERP study relating early brain responses to speech, language input, and later word production
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DOI：
10.1016/j.wocn.2011.07.002
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发表时间：
2011-10-01
影响因子：
1.9
通讯作者：
Kuhl, Patricia K.
中科院分区：
文献类型：
--
作者：
Garcia-Sierra, Adrian;Rivera-Gaxiola, Maritza;Kuhl, Patricia K.
关于双语儿童言语加工发展的研究通常采用横断面设计，并依赖于行为测量。这项研究是第一次在对这一人群的纵向研究中探索大脑测量方法。我们报告了一项对西班牙语-英语双语儿童进行的纵向研究的第一阶段数据分析的结果，以及(A)两种语言语音辨别的早期大脑测量，(B)在家中接触每种语言的程度，以及(C)儿童后来的双语单词产生能力之间的关系。用事件相关脑电位(ERPs)评估言语辨别能力。一份双语问卷被用来量化家庭中所有成年说话者的语言接触量，并对随后的两种语言的词汇量进行评估。我们的结果表明，双语婴儿的大脑对言语的反应不同于单语婴儿所表现的模式。双语婴儿在6-9个月时没有表现出西班牙语或英语对照的神经辨别能力。在10-12个月龄时，观察到两种对照的神经辨别能力。随着年龄的增长，双语婴儿对两种语言语音单位的神经辨别能力不断提高。双语婴儿言语辨别能力的群体差异与他们在家中接触每种母语的时间长短有关。最后，我们发现婴儿的后期单词产生能力与他们早期的神经辨别技能和早期接触两种语言的数量显著相关。(C)2011爱思唯尔有限公司。保留所有权利。
Research on the development of speech processing in bilingual children has typically implemented a cross-sectional design and relied on behavioral measures. The present study is the first to explore brain measures within a longitudinal study of this population. We report results from the first phase of data analysis in a longitudinal study exploring Spanish-English bilingual children and the relationships among (a) early brain measures of phonetic discrimination in both languages, (b) degree of exposure to each language in the home, and (c) children's later bilingual word production abilities. Speech discrimination was assessed with event-related brain potentials (ERPs). A bilingual questionnaire was used to quantify the amount of language exposure from all adult speakers in the household, and subsequent word production was evaluated in both languages. Our results suggest that bilingual infants' brain responses to speech differ from the pattern shown by monolingual infants. Bilingual infants did not show neural discrimination of either the Spanish or English contrast at 6-9 months. By 10-12 months of age, neural discrimination was observed for both contrasts. Bilingual infants showed continuous improvement in neural discrimination of the phonetic units from both languages with increasing age. Group differences in bilingual infants' speech discrimination abilities are related to the amount of exposure to each of their native languages in the home. Finally, we show that infants' later word production measures are significantly related to both their early neural discrimination skills and the amount exposure to the two languages early in development. (C) 2011 Elsevier Ltd. All rights reserved.