Extracts from the preface to the first edition; Preface to the second edition; Chapter 1: Introduction; Chapter 2: The acquisition of sound systems; Chapter 3: Morphological development; Chapter 4: The acquisition of syntax; Chapter 5: Further aspects of syntactic and semantic development; Chapter 6: Cognition, environment and language learning; Chapter 7: Performance development; Bibliography; Appendix 1: Methods in child language research; Appendix 2: Resources for child language research