Frontmatter -- Acknowledgements -- Table of contents -- Chapter 1. Introduction -- Chapter 2. The psychological reality of grammars -- Chapter 3. The child's acquisition of the optimal grammar -- Chapter 4. Stages of acquisition -- Chapter 5. Principles of grammar and acquisition -- Chapter 6. The importance of data -- Chapter 7. Acquisition and markedness -- Chapter 8. Conclusion: The interaction of grammatical theory and acquisition -- References