期刊
DEVELOPMENTAL SCIENCE
卷 14, 期 2, 页码 242-248出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1467-7687.2010.00973.x
关键词
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资金
- NICHD NIH HHS [L40 HD054065, L40 HD054065-02, HD37954, R01 HD037954-10, F32 HD050033, R01 HD037954] Funding Source: Medline
- NIDCD NIH HHS [P30 DC004661-12, P30 DC004661] Funding Source: Medline
Language experience 'narrows' speech perception by the end of infants' first year, reducing discrimination of non-native phoneme contrasts while improving native-contrast discrimination. Previous research showed that declines in non-native discrimination were reversed by second-language experience provided at 9-10 months, but it is not known whether second-language experience affects first-language speech sound processing. Using event-related potentials (ERPs), we examined learning-related changes in brain activity to Spanish and English phoneme contrasts in monolingual English-learning infants pre- and post-exposure to Spanish from 9.5 to 10.5 months of age. Infants showed a significant discriminatory ERP response to the Spanish contrast at 11 months (post-exposure), but not at 9 months (pre-exposure). The English contrast elicited an earlier discriminatory response at 11 months than at 9 months, suggesting improvement in native-language processing. The results show that infants rapidly encode new phonetic information, and that improvement in native speech processing can occur during second-language learning in infancy.
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