Recent years have seen a revolution in our knowledge of how children learn to think and speak. In this volume, leading scholars from these rapidly evolving fields of research examine the relationship between child language acquisition and cognitive development, bringing two vital strands of investigation into close dialog. The book explains important new ideas about how language acquisition interacts with the process of early cognition, providing original empirical contributions based on a variety of languages, populations and ages as well as theoretical discussions that bridge psychology, linguistics and anthropology.