Jessica L. Montag, Michael N. Jones, and Linda B. Smith. The Words Children Hear: Picture Books and the Statistics for Language Learning, Psychological Science 0956797615594361, August 4, 2015.
Young children learn language from the speech they hear. Previous work suggests that greater statistical diversity of words and of linguistic contexts is associated with better language outcomes. One potential source of lexical diversity is the text of picture books that caregivers read aloud to children. In this study, researchers looked at the language content of 100 popular picture books. In comparing the language in books to the language used by parents talking to their children, the researchers found that the picture books contained more “unique word types.” The text of picture books may be an important source of vocabulary for young children, and these findings suggest a mechanism that underlies the language benefits associated with reading to children.