Two stages in the vocabulary development of two-year-olds are reported. In the earlier Receptive stage, the child says many fewer nouns than he understands and says no verbs at all although he understands many. The child then enters a Productive stage in which he says virtually all the nouns he understands plus his first verbs. (Author/DEP)

Analysis of 24 spontaneous speech samples from children at 24 and 30 months revealed a correlated progression in the form, function, and meaning of adjective modifiers used with increased language development. (Author/DEP)

Compares the many-perspectives account of lexical acquisition--which proposes that children learn to take alternative perspectives along with the words they acquire--to the one-perspective account--which proposes that children are at first able to use only one term to talk about an object or event. Provides evidence from a variety of sources that…

Examined three-year-old children's ability to generalize novel words to new instances. Suggested that children's similarity judgments and feature selection in name generalization are guided by nonstrategic attentional processes that are minimally influenced by new conceptual information. Proposed that these findings may explain the extraordinary…

Two experiments examined toddlers' noun vocabularies and interpretations of names for solid and non-solid items. Results indicated that one side of the solidity-syntax-category organization mapping was favored. Seventeen- to 33-month olds do not systematically generalize names for solid things by shape similarity until they already know many…