This study examines vocabulary growth rates in first and second languages for Spanish-speaking and Cantonese-speaking English language learners from kindergarten through second grade. Growth-modeling results show a within-language effect of concepts about print on vocabulary. Language exposure also had an effect on English vocabulary: earlier…

This paper investigated the predictive ability of expressive vocabulary size and lexical composition at age 2 on later language and literacy skills from ages 3 through 11. Multivariate analysis of covariance was performed to compare 16 language and literacy outcomes between children with large expressive vocabulary size at 24 months (N = 1,073)…

Five experiments examined whether overt repetition (i.e., saying a word aloud) during exposure is critical to the expressive learning of new words. When participants did not engage in overt repetition during exposure, they nevertheless exhibited clear expressive learning, both with and without an accompanying semantics, indicating that overt…

Language samples elicited through a picture description task were recorded from 38 adolescents and adults with Williams syndrome (WS) and one control group matched on age, and another matched on age, IQ, and vocabulary knowledge. The samples were coded for use of various types of inferences, dramatic devices, and verbal fillers; acoustic analyses…

This study compared language skills in a group of very low-income toddlers with those of a middle-income sample matched on age and sex. The assessment instrument used was the MacArthur Communicative Development Inventory for toddlers, a parent report form. Scores for low-income group were strikingly lower on three key indices evaluated: size of…

Investigated the relationships of expressive vocabulary size with frequency of being read to and frequency of watching television among 64 bilingual 21- 27-month-old children from homes in which Spanish and English were spoken. Frequency of being read to in each language was positively correlated with expressive vocabulary size. Frequency of…

This follow-up study compares cognitive and language aspects of a group of Italian children ages 4-6 years, who had shown delayed expressive language abilities at 24 months of age (late talkers), with those of a group of children with a history of normal expressive language development (average talkers). Children were given a battery of…

Comparison of language-impaired two- to three-year-olds (N=10) and normal one-year-olds (N=15) matched for expressive language revealed that the language-impaired subjects acquired a greater number of object concepts presented in a no-action condition than the normal children, although language-impaired subjects' extensions of the names to new…