Four experiments investigated children's ability to notice and remember events in which the acquisition of factual information occurs. Results indicated that children tend to report they have known newly learned information for a long time, suggesting that children have some understanding of knowledge acquisition, but not at the level of adults.…

Children's magical explanations and beliefs were investigated in two studies. Found that many four-year olds view magic as a plausible mechanism, yet reserve magical explanations for certain real world events that violate their causal expectations. Parents and culture at large may at first actively support magical beliefs whereas peers and schools…

Examined the nature of perceptual classification in children and young adults. Found that most children attend selectively to one stimulus dimension when making perceptual classification judgments. Suggests that this developmental trend does not appear to be a holistic-to-analytic shift but rather a trend toward greater consistency in following a…

Examined the use by children of the Novel Name-Nameless Category principle, under the framework that lexical principles are acquired in a developmental sequence. Results indicated that the particular principle was not available at the start of lexical acquisition but that exhaustive categorization ability and a vocabulary spurt occur…

Examined infants' tendency, from a few days to nine months of age, to prefer infant-directed over adult-directed speech. Results suggest that exaggerated pitch contours that characterize infant-directed speech may become salient communicative signals for infants through language-rich, interactive experiences with caretakers and increased…

Examined children's emotional and behavioral regulation and emotional and prosocial responses to a crying infant. Found that children who could regulate their arousal were unlikely to become distressed and more likely than other children to talk to and comfort the crying infant. Girls were more responsive and engaged in more active responses than…

Investigated how children's decisions about allocating money to story characters were affected by the relationship (friends versus strangers) among the characters. Children's rationales for their decisions showed that equality was the most salient principle for decisions at all ages and that older children provided rationales based on benevolence…

Two studies examined concepts of personal autonomy and social roles among persons in different types of cultures. Found that Druze subjects attributed more power than Jewish subjects to males over females, but concepts of personal entitlements were prominent in both groups. Overall, findings indicated that social reasoning is heterogeneous in…

Examined stress and coping symptoms of 258 children whose parents were divorced. Found that, in the cross-sectional model, avoidance coping partially mediated the relations between negative events and symptoms; while active coping moderated between negative events and conduct problems. In the longitudinal model, significant negative paths were…

Examined individual differences in friendship characteristics and their cross-sectional and longitudinal interrelations with adolescent problems. Assessed four salient friendship characteristics: reciprocity of relations, overt hostility, covert hostility, and self-disclosure. Suggests that adolescent problem behaviors have a more potent…

Assessed the extent to which preferential personal attraction was associated with behavioral similarity among newly acquainted children. Found that "discriminating" children were more behaviorally similar to preferred playmates than nonpreferred playmates, both in terms of cognitive play style and social participation. (AA)

Examined the hypothesis that young children's social behavior in stable groups of peers becomes relationship specific to some extent with increasing group socialization and predicts important developmental outcomes beyond these relationships, such as social self-esteem in middle childhood when children attend different peer groups. The hypothesis…

Examined academic and behavioral problems as a function of two dimensions by which rejection may vary over time: chronicity and temporal proximity. Suggests that all levels of rejection were associated with greater absenteeism from school, and more chronic and proximal experiences of rejection were associated with elevated externalizing behavior…

Compared 30 Japanese and 30 American mothers' speech to their 6-, 12-, or 19-month-old infants. Mothers of both cultures used linguistic simplification and repetition. American mothers labeled objects more frequently than did Japanese mothers, whereas Japanese mothers used objects to engage infants in social routines more often than did American…

Presented five-month olds in English-speaking families with approval and prohibition vocalizations in infant-directed (ID) and adult-directed (AD) English, and in ID German, Italian, Japanese, and nonsense English. Infants responded differently to ID approval and disapproval in all languages except Japanese. Differential responses to approval and…