Variability and Consistency in Early Language Learning

Table Of Contents

Preface ix
Overview ix
Outline xi
How to Read This Book xiii
Acknowledgments xiv
1 Theoretical Foundations 1
2 Practical Foundations 15
3 Methods and Data 27
4 Measurement Properties of the CDI 45
5 Vocabulary Size 65
6 Demographic Effects on Vocabulary Size 85
7 Gesture and Communication 111
8 Consistency in Early Vocabulary 125
9 Demographic Variation in Individual Words 139
10 Predictive Models of the Acquisition of Individual Words 165
11 Vocabulary Composition: Syntactic Categories 181
12 Vocabulary Composition: Semantic Categories 203
13 Morphology, Grammar, and the Lexicon 221
14 Morphological Overgeneralization 243
15 Individual Variation in Vocabulary 255
16 Variability and Consistency within and across Languages 283
17 Language Development at Scale 289
18 Beyond the CDI 303
Appendix A Individual Datasets 311
Appendix B Measures of Variability 325
Appendix C Stitching across Forms 329
Appendix D Estimating Age of Acquisition 333
References 337
Index 357