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)

Examined the communicative behavior of 40 maltreated and nonmaltreated 31-month-old toddlers and their mothers. Results revealed that maltreated toddlers followed a pattern of shorter mean length of utterance, less descriptive speech, and proportionally less relevant speech. (RJC)

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)