To understand the development of number-word construction, students in grades 1, 3, 5, and 7 named and counted from a set of numbers into the billions in two studies. Findings are discussed both in relation to children's growing knowledge of the number system and to vocabulary development. (Author)

The hypothesis explains the early lexical development of children and the predictions of this hypothesis are shown to be consistent with available data on overextension. (Author/NCR)

People of ages 4, 6, 8, 10, 20 and 70 years named pictures selected to represent the entire range of lexical consensus among 20-year-olds. Consensus within each group increased with age, up to 20. Data indicate words coding culturally important events are acquired earliest. (CHK)

Twenty language-delayed children (age three to six) viewed a presentation incorporating object, action, attribute, and affective state words into a narrative script. In pre- and postviewing word comprehension measurements, subjects scored lower than children matched for chronological age and children matched for mean length of utterance.…

This paper explores the questions of how and why children learn names for things. The acquisition of reference is set within a broader discussion of linguistic representation, which defines language as a system functioning in a three-way relationship among the individual language user, the world of experience, and the social community. It is…

Examined overregularization of irregular verb forms in children's language learning. Found that overregularization errors are relatively rare; occur at a constant rate; and are not correlated with the proportion of regular verbs in parents' or children's speech. Also found that a period of correct performance precedes the child's first error. (BC)

Noting that young children learn to talk at different ages but within certain developmental boundaries, this document presents two charts to help parents facilitate their toddler's speech. The first chart lists characteristics to look for in a growing, healthy baby at various ages between 3 months and 24 months, and suggestions for when to talk to…