This fascinating companion to the award-winning Meaningful Differences in the Everyday Experience of Young American Children reveals how daily child-parent social interactions govern children's language and social development.

Based on unparalled data from 2-1/2 years of observing the everyday interactions of 1- and 2-year-old children learning to talk in their own homes, Hart and Risley have charted the month-by-month growth of the children's vocabulary, utterances, and use of grammatical structures. The compelling narrative highlights reliability-tested research findings and...