Home-environmental processes, socioeconomic indicators, and family structure measures were canonically correlated with four mental abilities of 185, 11-year-old boys. Verbal and number abilities were the most predictable, with the process measures contributing the most to prediction. (DP)

Language development was studied in 310 pairs of 4-year-old twins. Rotated factor analyses indicated presence of a general language factor (L) and a general nonverbal factor (NV). Moderate genetic influence was found for L and NV abilities. Bivariate genetic analysis estimated a genetic correlation of .63 between L and NV abilities. Results…

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)

Examines the hypothesis that adults and children have media-specific conceptions of picturing and that the functional uses of photography and drawing differ across development. Results showed an age progression from viewing photography as only reflecting the real object to viewing it as a medium that allows for control and alteration of reality.…

Compared preschoolers with autism spectrum disorders with a matched control group to investigate whether weak central coherence could account for deficits in two behaviors purported to tap capabilities fundamental to a theory of mind: joint attention and pretend play. Found that pretend play did not differentiate the two groups. Weak central…

Collected data on twins' performance on 13 cognitive variables measured three times at three-year intervals. Twins were monozygotic or dizygotic pairs reared together or apart and were in six cohorts ranging in age from 41 through 84 years. Found stable mean cognitive performance across time on eight measures for the younger cohorts, and…

Reports the results of cognitive test performance and early childhood activities in individuals with congenital adrenal hyperplasia, an autosomal recessive disorder associated with elevated prenatal adrenal androgen levels, demonstrating the effects of early exposure to excess androgenizing hormones on sexually dimorphic cognitive functioning.…

Verbal precocity at 20 months of age did not predict children's later precocious reading. Frequency of story reading in the home at 24 months predicted children's language ability at 2.5 and 4.5 years and, along with literacy instruction, predicted knowledge of print conventions at 4.5. (BC)

Comparisons were made in the conversations of 16 low income children in a preschool intervention program, a group of low income children not in the program, and a group of middle income children. Adults' conversational turns included three types of cognitively complex initiations. Results demonstrated a facilitating effect of day care…

Examined the performance of kindergartners from middle- and low-income families on arithmetic calculations presented in a nonverbal format and in three verbal formats. Children from middle-income families performed better than those from low-income families on verbal calculation tasks but not on the nonverbal task. (BC)

Developmental changes and individual differences in children's conceptions of transgression were studied in 46 children from preschool through 1st grade. Differences in response to moral transgressions in kindergarten were related to mothers' control management and to siblings' friendly behavior in the preschool period, early understanding of…

Assessed the quality of home and out-of-home care environments, child temperament, and the development of verbal abilities among infants at 18 months and then at 8 years of age. Found that both tested and rated cognitive abilities at age 8 were related to earlier measures of verbal ability and to paternal involvement during preschool years. (MOK)