Brain bases of morphological processing in Chinese-English bilingual children.
Brain bases of morphological processing in Chinese-English bilingual children.
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DOI：
10.1111/desc.12449
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发表时间：
2017-09
影响因子：
3.7
通讯作者：
Kovelman I
中科院分区：
文献类型：
--
作者：
Ip KI;Hsu LS;Arredondo MM;Tardif T;Kovelman I
双语接触会影响儿童学习阅读的神经回路吗？为了回答这个问题，我们研究了形态意识的大脑基础，形态意识是学习英语和汉语阅读的关键口语能力之一。中英双语和单语英语儿童（N = 22，7 - 12岁）完成了最能表征他们每种语言的形态学任务：汉语的复合形态学（例如，basket + ball = basketball）和英语中的派生形态（例如，re + do = redo）。与单语者相比，双语者在左中颞区表现出更大的激活，这表明双语暴露于中文影响支持语义能力的大脑区域的功能。与单语者类似，双语者在英语中的左下额叶区[BA 45]比汉语中的激活更大，这表明年轻的双语者形成了语言特异性神经表征。这些发现为双语和跨语言的语言和识字习得模型提供了新的见解。这项研究调查了双语接触对儿童语言和阅读能力的影响。在听觉形态觉知任务中，年轻的中英双语者在左额下回（IFG）表现出类似单语能力和语言特异性激活模式。在左侧IFG BA 45中，英语的这种激活大于中文，但在左侧IFG BA 47中，不同语言之间的激活相似。与英语单语者相比，双语者在MTG左侧区域的激活程度更高，并且这种激活程度与双语者的英语读写能力显著相关。研究结果表明，双语接触到丰富的词汇形态学的语言，如中文，影响双语者的左颞区的功能通常与词汇语义处理和连接单词的意义，他们的拼写形式的能力。
Can bilingual exposure impact children’s neural circuitry for learning to read? To answer this question, we investigated the brain bases of morphological awareness, one of the key spoken language abilities for learning to read in English and Chinese. Bilingual Chinese-English and monolingual English children (N = 22, ages 7–12) completed morphological tasks that best characterize each of their languages: compound morphology in Chinese (e.g., basket+ball = basketball) and derivational morphology in English (e.g., re+ do = redo). In contrast to monolinguals, bilinguals showed greater activation in the left middle temporal region, suggesting that bilingual exposure to Chinese impacts the functionality of brain regions supporting semantic abilities. Similar to monolinguals, bilinguals showed greater activation in the left inferior frontal region [BA 45] in English than Chinese, suggesting that young bilinguals form language-specific neural representations. The findings offer new insights to inform bilingual and cross-linguistic models of language and literacy acquisition. The study investigated the impact of bilingual exposure on children’s language and reading abilities. During auditory morphological awareness tasks, young Chinese-English bilinguals showed monolingual-like competence as well as language-specific patterns of brain activation in left inferior frontal gyrus (IFG). This activation was greater for English than for Chinese in left IFG BA 45, but similar across languages in left IFG BA 47. Relative to English monolinguals, the bilinguals showed greater activation in left MTG region and this activation was significantly correlated with bilinguals’ English literacy. The findings suggest that bilingual exposure to a language with rich lexical morphology, such as Chinese, impacts the functionality of bilinguals’ left temporal regions typically associated with lexicosemantic processing and the ability to link word meanings to their orthographic forms.