The chapters in this volume provide the first comprehensive overview of trends in research on early phonological, lexical, syntactic and pragmatic development in children acquiring two (or more) languages simultaneously. Ongoing as well as emerging issues are examined and discussed by leading researchers in the field. Collectively, these studies extend our knowledge of bilingual acquisition and broaden our understanding of the child's ability to acquire and use language. This volume is of interest to researchers working on language acquisition by monolingual and bilingual children, graduate students of psychology, linguistics and communication sciences, and researchers and professionals concerned with the diagnosis and treatment of bilingual children with language impairment.