This book presents a general overview of our current knowledge of language development in children. All the principal strands of language development are covered, including phonological, lexical, syntactic and pragmatic development; bilingualism; precursors to language development in infancy; and the language development of children with developmental disabilities, including children with specific language impairment. Written by leading international authorities, each chapter summarises clearly and lucidly our current state of knowledge, and carefully explains and evaluates the theories which have been proposed to account for children's development in that area.