Frontmatter -- CHAPTER 1: GENERAL INTRODUCTION -- CHAPTER 2: ORAL DUTCH LANGUAGE PROFICIENCY OF TURKISCH CHILDREN BORN IN THE NETHERLANDS: Overall results -- CHAPTER 3: MORPHOLOGICAL PROFICIENCY: L1 and L2 development of the verbal predicate -- CHAPTER 4: SYNTACTIC PROFICIENCY: Complexity and correctness of utterances -- CHAPTER 5: SEMANTIC PROFICIENCY: The communication of perceptual experiences -- CHAPTER 6: THE INFLUENCE OF SOCIAL AND SOCIO-PSYCHOLOGICAL FACTORS ON SECOND LANGUAGE PROFICIENCY -- APPENDICES -- REFERENCES -- SUBJECT INDEX