The number of unique words in children's speech is one of most basic statistics indicating their language development. We may, however, face difficulties when trying to accurately evaluate the number of unique words in a child's growing corpus over time with a limited sample size. This study proposes a novel technique to estimate the latent number…

The present study investigated children's early use of verb inflection in Japanese by comparing a generativist account, which predicts that the past tense will have a special default-like status for the child during the early stages, with a constructivist input-driven account, which assumes that children's acquisition and use of inflectional forms…

The acquisition of noun gender on articles was studied in a sample of 21 young German-speaking children. Longitudinal spontaneous speech data were used. Data analysis is based on 22 two-hourly speech samples per child from 6 children between 1 ; 4 and 3 ; 8 and on 5 two-hourly speech samples per child from 15 children between 1 ; 4 and 2 ; 10. The…

Replies to a report on three toddlers who evidenced a late vocabulary spurt. The article argues that differences in assessing productive vocabulary and the questionable inference that size of the lexicon is a reliable indicator of the vocabulary spurt make it inappropriate to compare these children to previous studies directly measuring change in…

Investigates the relationship between observational and checklist measures of vocabulary composition in preschool children. Results indicate that while the two measures are correlated, there are systematic quantitative differences between them, reflecting a combination of checklist, maternal-report and observational sampling biases. (22…

Examines the spontaneous speech of Portuguese-speaking two-year olds in natural conversation with Portuguese-speaking adults. The children were separated into three groups based on Mean Length of Utterance in Words (MLUW). The children in the highest-MLUW group almost perfectly matched the adult speakers on every measure. (37 references)…

Investigates whether children ages 1;6 just beginning to learn words can learn new words in a variety of nonostensive contexts. The results of two studies involving adults interacting with children in games of searching for objects suggest that from very early in language acquisition, children learn words through active attempts to understand…

Addresses how affective facial expression interacts with the linguistic forms in American Sign Language (ASL) motherese. The article presents data from both cross-sectional and longitudinal interaction from 15 deaf mothers signing with their deaf toddlers. Findings indicate a shift from affect to grammar at about the child's second birthday. (59…