The verbal interactions of 20 mothers with their children, who were between 1.9 and 5.0 years old, were recorded and analyzed. (SB)

Examines the relationship between adult recasts of child utterances and the child's acquisition of syntactic structures. Results indicate that maternal recasts of specific morphemes were related to the acquisition of those specific morphemes during certain developmental periods, whereas other grammatical morphemes were facilitated by expansions…

The nature of early games and how they might assist the infant in language acquisition were explored in a longitudinal study of two mother-infant dyads, using video-recordings of their free play. The analysis of appearance and disappearance games was particularly revealing. (EJS)

Examined relationships between early vocabulary composition, early language use, and properties of mothers' child-directed speech at 10 words. Found that, when the effects of the child on the mother at 10 words was controlled, there was a negative correlation between mothers' production of speech illustrating word boundaries and the percentage of…

This study examined the social labels which are first used by infants, social differentiation on the basis of labeling behavior, and overgeneralization of social labels. Subjects were 81 infants from 9 to 36 months of age. The 9- to 24-month-olds were shown slides of themselves, their mothers, their fathers, and unfamiliar children, babies, and…

Dynamic aspects of maternal language instruction and first language learning were explored by observing one- to five-year-old middle-class children with their mothers. (CM)

Mothers' utterances were measured during interactions with their 13-month-old infants and correlated with measures of infants' productive lexical development at 13 and 24 months. Correlations between maternal measures and infants' lexical development were lower for employed mothers than for mothers who were full-time caregivers. (BC)

This study investigated whether mothers' responses to their infants' gestures play a role in their infants' vocabulary development. Eight infants were observed interacting at home with their mothers on 2 occasions, when the infants were 10 to 12 months old, and 16 to 18 months old. Videotapes of the observations were transcribed and coded for…

To study maternal behaviors as related to social class differences, 30 middle class and 30 working class white mothers were observed at home on two separate days with their 10-month-old firstborn baby girls. Predesignated behaviors which occurred during 5-second intervals were recorded by an observer. Total observation time was 4 hours for each…

The maternal linguistic environments of 12 normal and Down's syndrome (DS) children (ages 1-4 years) were studied and compared, with an eye toward isolating factors that might retard the acquisition of verbal communication in the DS children. (DLS)

This paper reports two studies which examined sequential dependence in the dyadic interaction between mother and infant. In the first study, brief videotaped behavioral samples were collected for 24 primiparous mother-infant (M - I) dyads to examine the degree of reciprocal contingency in M - I interactions. Two coders, using a computer interfaced…

Examined the role of exposure to speech in children's vocabulary growth. Characterized vocabulary growth rates for children from 14 to 26 months of age. Found a relation between individual differences in vocabulary acquisition and variations in the amount of a mother's speech to her children. (BC)

Activities of the Institute for Development of Human Resources provide the information contained in this document. This first large-scale project of the institute was in parent education of disadvantaged mothers in the north central Florida area. The purpose of the project was to investigate a way in which early intervention into the lives of…