The question of a sensitive period in language acquisition has been subject to extensive research and debate for more than half a century. While it has been well established that the ability to learn new languages declines in early years, the extent to which this outcome depends on biological maturation in contrast to previously acquired knowledge…

Interviews with 108 Navajo children from bilingual first grade classes on Navajo reservations were recorded. Analysis of the interviews focused on phonological, grammatical, and lexical features that show a systematic variation within the speech of individuals or between individuals. Variable features were compared with background factors such as…

This is a report on a child's English and French speech before, during and after a summer vacation in France. The findings are based on recorded samples of her speech in both languages elicited at three times: (1) immediately preceding the trip at age 3 years, 8 months; (2) 2 and l/2 months later; and (3) again 2 and l/2 months after her return to…

This book is a comprehensive treatment of the literature on second language acquisition in childhood, viewed in terms of contemporary process models. After a general introduction on bilingualism in society, six major topics are considered: first-language acquistion, language acquisition and learning in childhood and adulthood, simultaneous…

A collection of papers on bilingual education covers these topics: (1) second-language acquisition theories relevant to bilingual education; (2) the age factor in native language maintenance and in the development of English proficiency of overseas Japanese children; (3) applying the Cummins language proficiency model to students who acquire…