Longitudinal studies of the application of a paraphrasing model to 18- to 28-month-olds indicated that mean length of utterance was significantly correlated with realized and paraphrased frequencies of several linguistic items in the subjects' corpora. The model was productive for examining children's corpora of speech and the linguistic…

When lexical availability was manipulated through discourse support and word frequency for 40 target nouns, measurement of effects on length, complexity, order of mention, and fluency of 4- to 8-year-olds' utterances showed that the number and length of responses containing the target word varied with age, word frequency, and discourse support…

A 20-minute videotape sample was obtained of the language interactions between 20 Down syndrome children (ages 38 to 107 months) and their mothers during informal playtime. Linguistic utterances of mothers and children were coded according to the following language categories: query, declarative, imperative, performative, feedback, imitation,…

Maternal language directed to 21 nonhandicapped, 21 Down syndrome, and 19 language impaired preschool children was examined. The three groups (all Caucasian and middle-class) were matched in mean length of utterance (MLU) and in developmental skills as measured on the Vineland Adaptive Behavior Scale. Mother-child language interaction was…