Five experiments with 12-, 15-, and 18-month-olds examined 276 infants' ability to learn from television under semi-naturalistic conditions. Findings indicated that infants of all ages imitated live-modeled actions. There were age- and task-related differences in infants' ability to imitate the same television-modeled actions. Findings highlighted…

This study examined ability of first and fourth graders and adults to recall digits they heard while they were carrying out a visual task. Results suggested that each individual has a core memory capacity limit that can be observed in circumstances in which it cannot be supplemented by mnemonic strategies. The capacity limit increases with age…

Examined 7- to 10-year-olds' ability to acquire a domain-general processing strategy--Control of Variables Strategy (CVS)-- and make valid inferences. Found that with explicit training within domains and probe questions, children could learn and transfer the CVS. Probes without direct instruction did not improve CVS and inferential thinking…

Two studies determined the extent to which feedback could improve eighth graders' and adults' decision-making. Results showed that neither benefited from verbal feedback in choosing between easy and hard questions to earn points. Adults benefited more than adolescents from outcome feedback. Adults also benefited more than adolescents in context of…

This article proposes a new schema for defining developmental stages in the drawing of geometrical objects. In four studies, children and adults drew cubes and cylinders. Data demonstrate that stages appear in invariant order with 2-year-olds drawing scribbles, single units appearing at 3 years, differentiated figures at 4 years, and integrated…

Used data from sibling pairs from the National Longitudinal Study of Adolescent Health to examine how parental education moderated the genetic and environmental contributions to variation in verbal IQ. Found that the variance estimate for heritability was greater than that for shared environment for the whole sample. Both estimates were moderated…

Two studies examined sixth graders' personality theories on stereotype formation. Compared to those with malleable views, children with fixed views of personality made more extreme trait ratings of schools characterized positively or negatively, generalized judgments to an unknown student, perceived greater within-school similarity and…

Used semi-parametric mixture model with boys assessed repeatedly from 6 to 15 years to approximate a continuous distribution of developmental trajectories for aggression, opposition, and hyperactivity. Found that a chronic oppositional trajectory, with other trajectories held constant, led to covert delinquency only. A chronic physical aggression…

Traced links among family financial resource adequacy, maternal beliefs and behavior, developmental goals, and child outcomes in rural, single-parent African American families of 6- to 9-year-olds. Found that financial adequacy was linked with childrearing efficacy. Efficacy beliefs were linked with parenting practices indirectly through…

Investigated relations among parenting, sibling relationship, peer group, and adolescents' externalizing behaviors. Found that contributions of parental negativity, parental monitoring, and sibling negativity to adolescents' externalizing behaviors operated directly and also indirectly through deviant peer associations. Relationships varied as a…

Examined effects of SES components for divorced/recently separated mothers of 6- to 9-year-old sons. Found that SES indicators were associated with better parenting. Parenting indirectly affected achievement through home skill building and school behavior. Maternal education direct effect was mediated by home skill building. Maternal occupation…

Examined influence of residential dislocations on child behavior problems, depression, peer competence, cognitive competence, and quality of sibling relationships among Head Start children and their older siblings. Found that child emotionality moderated the effects of residential mobility. Caregiver conflict was a less powerful moderator.…

Three experiments used a familiarization/novelty or a habituation/dishabituation procedure to examine developmental change in infants' tendency to parse exemplars into separate categories. Results indicated that 10-month olds appeared to form differentiated categories, whereas 4- and 7-month olds formed a single category to include the range of…

This study tested three hypothesized mechanisms through which explanations might facilitate problem-solving strategy generalization in kindergarteners through second graders. Results suggested that explanations facilitated generalization through the creation of novel goal structures that enabled children to persist in use of the new strategy…

Compared exploratory, symbolic, and social play and interaction of Argentine and U.S. 20-month olds and their mothers. Found patterns of cultural similarity in sex differences and differences in the use of exploratory and symbolic play. Overall, Argentine and U.S. dyads used different modes of exploration, representation, and interaction,…