To evaluate which features of spoken language aid infant word learning, a corpus of infant-directed speech (M. R. Brent & J. M. Siskind, 2001) was characterized on several linguistic dimensions and statistically related to the infants' vocabulary outcomes word by word. Comprehension (at 12 and 15 months) and production (15 months) were…

The longitudinal association between competitive video game play and aggression among young adults and adolescents was examined. Young adults (N = 1,132; M[subscript age] = 19 years) were surveyed annually over 4 years about their video game play and aggression, and data from a 4-year longitudinal study of adolescents (N = 1,492; M[subscript…

Teacher-child relationships were examined as predictors of cortisol change in preschool children. Saliva for assays was collected from one hundred and ninety-one 4-year-olds (101 boys) in the mornings and afternoons on 2 days at child care, and before and after a series of challenging tasks and a teacher-child interaction session outside the…

This review of literature on infant habituation and recognition memory performance as predictors of later IQ concludes that the level of prediction is (1) substantial; (2) higher for at-risk than nonrisk children; and (3) not higher than the level of predictions based on parental education and socioeconomic status. (MDM)

Examined contemporaneous and predictive relations between parenting styles, adolescents' attributions, and educational outcomes. Found that adolescents who perceived their parents as nonauthoritative were more likely than peers to attribute achievement outcomes to external causes or low ability. The higher the proportion of dysfunctional…