在双语语言生产中,声学信息的神经表现
Xiaoyu Liu1,2, Xiaoyan Wu1,3,4,5, Yuan Feng1,3,4,5
1Philosophy and Social Science Laboratory of Reading and Development in Children and Adolescents (South China Normal University), Ministry of Education, 55 West of Zhongshan Avenue, 510631 Guangzhou, China.
Cerebral cortex (New York, N.Y. : 1991)
|November 15, 2024
概括
双语者在说话时表现出他们母语 (L1) 和第二 (L2) 语言的不同大脑模式. 主导的L1的声学表征始终活跃,即使在说L2时,也支持非选择性语言处理.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 心理语言学 心理语言学
背景情况:
- 双语语言生产研究往往强调认知控制机制.
- 在双语演讲中,词汇和语音信息的神经表现的理解仍然较少.
- 语言上下文 (单一与混合) 对这些表示的影响尚不清楚.
研究的目的:
- 研究双语者对母语 (L1) 和第二 (L2) 语言的语音信息的神经表征.
- 检查这些表示如何受到单语言与混合语言生产环境的影响.
- 为了测试双语语音的非选择性处理假设.
主要方法:
- 代表性相似性分析 (RSA) 用于分析神经成像数据.
- 参与者是中英双语者,在单语言和混合语言环境中发言.
- 行为表现和大脑激活模式在各种条件之间进行了比较.
主要成果:
- 双语者表现更差,在混合语言环境中,语言和认知控制领域的活化增加.
- 对L1的声学表示被局限于左侧骨干,中额头环和前额外环.
- 在双侧角角皮层中发现了L2的声学表示.
- 强烈的L1声学表示在L2生产期间在声学处理区域中持续存在,无论背景如何.
结论:
- 神经成像证据支持双语者非选择性处理假设.
- 主导语言 (L1) 的声学表示在双语语音产过程中优越且始终活跃.
- 特定的大脑区域以不同的方式表示L1和L2的语音信息,L1显示更广泛和更持久的激活.
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