This study of early word learning focused on the status of object words in early vocabularies. Fourteen children were followed from nine months to two years of age, and monthly vocabulary growth was analyzed. Results indicated that object words represented approximately one-third, on average, of the different words the children learned. (TJQ)

Children ages five, seven, and nine years named objects with multiple names in a neutral context and in a biased context. Children selected names in accord with nonlinguistic constraints, but at the cost of longer naming times. Both name selection success and associated cost were more evident in older children than in younger children. (TJQ)

This study of 2.5 and 3.5 year olds indicated that children of this age do not know many names for solid substances but can be taught names for them; that children represent the names as mass nouns and possibly adjectives; and that there is development of children's nonlinguistic knowledge of substances between the ages of 2.5 and 3 years. (TJQ)

Eight 20- to 26-month-old children were exposed to 4 novel nouns in a game context over several weeks to determine whether, when, and in what ways the children would use them beyond their original linguistic forms. The majority were productive in their use of the nouns, indicating that the grammatical category for noun is operational by age 2.…

Reviews "The Transition from Infancy to Language: Acquiring the Power of Expression" (L. Bloom). Underscores that Bloom's account of word learning represents an ethnographic, theoretic, and research approach that explores development by starting with the child, and looks at the many behaviors of the child and views these in relation to…

Reviews current research on children's concepts and categories that reflects a growing consensus that nonperceptual knowledge is central to concepts and determines category membership, whereas perceptual knowledge is peripheral in concepts and only a rough guide to category membership. Argues that there is no compelling basis in theory or in data…

Comments on the article by Jones and Smith in this issue. Responds to the theses that perceptual information is as much at the core of concepts as is nonperceptual information and that concepts are not represented as such but are computed on-line when needed. Presents a view of the relationship between perception and conceptual knowledge…

Comments on the article by Jones and Smith in this issue. Describes a program of research that demonstrates the important influence of perception on the structure of concepts. Proposes that both perceptual and nonperceptual information are important to conceptual structure throughout the continuum of knowledge acquisition and that perception is a…

Comments on the article by Jones and Smith in this issue. Outlines different perspectives from which the issue of conceptual development is approached, elaborating on the functions concepts serve and variations in those functions. Notes points of agreement with the perceptual knowledge view and offers comments on the research supporting the…

A study of two year olds investigated the nature and development of children's early productivity with verb-argument structure and verb morphology. Results indicated that the children showed no signs of productive verb morphology, but they did use newly learned verbs in some creative ways involving nounlike uses and the appending of locatives.…

Examined the effects of mothers' conversations with their children on children's emergent literacy. Found a clear and fairly strong relationship between maternal conversation and children's literacy, especially for children's print concepts, vocabulary, and story comprehension skills. Children's early conversational participation showed a stronger…

Examines children's variation in rate, style, and sequence of grammatical development, within and across natural languages. Using a sample of English and Italian infants, concludes that while there are structural differences between English and Italian that could affect the order in which nouns and verbs are acquired, no differences were observed…