Examined in four studies the predictive value of organizing locations into a systematic figure for predicting preschoolers' use of spatial relations in a mapping task. Found that seeing a dog pattern formed by search locations facilitated performance of 5-year-olds but not younger children. Verbal labels alone or adding lines to an unsystematic…

Compared adolescents' (14 to 20 years) and young adults' (21 to 37 years) wisdom-related knowledge and judgment related to difficult and ill-defined life dilemmas. Rated responses along five wisdom criteria. Found that adolescents performed at lower levels than young adults but also demonstrated substantial age increments in performance.…

Compared how 8-, 10-, and 12-year-olds responded to provocation by a same- or an other-gender peer in a laboratory play session. Found that responses to other-gender peer were more negative than to same-gender peer during baseline and provocation periods. With other-gender partners, participants reported liking them less, trying less to get along,…

Examined third- and seventh-graders' and college students' thinking regarding different types of disagreements. Found that participants' thinking was constrained by the realm and form of the disagreement. At all ages, participants judged some disagreements acceptable and others unacceptable, described disagreements based on different attributes,…

Examined the role of early versus ongoing maternal responsiveness in predicting cognitive and social development for full-term and preterm children (low- and high-risk) at five ages. Found that children, especially preterm children, showed faster cognitive growth when mothers were consistently responsive. Social growth was similar in the…

Examined role of pubertal and social transitions in emergence of gender differences in depressive symptoms. Found that differences emerged during eighth grade. Seventh-grade pubertal status related to depressive symptoms. Recent stressful life events related to increased depressive symptoms. Early-maturing girls with higher levels of initial…

Three experiments examined effects of age and task interruption on children's prospective memory (PM), remembering to carry out a future task. Age explained a small portion of variance in performance. Children who did not have to interrupt their ongoing activity to complete the PM tasks performed significantly better than children who had to…

Examined whether preschool children's play-partner choices were stable over time and how they influenced behavior. Found that partner preferences were highly sex differentiated and stable over time. Identified two types of consequences of partner choice: a binary effect that influenced differences between the sexes and a social dosage effect that…

Suggests that the findings of Legerstee, Barna, and DiAdamo (2000) are most parsimoniously explained by associative learning and may not constitute a precursor to later understanding of intentionality. Argues for the importance of differentiating between associative and inferential processes and reviews evidence that the understanding of…

Maintains author's interpretation of 6-month-olds' behavior is consistent with task requirements in the 2000 study and previous work showing that infants use explanatory inferences to make sense of their world. Asserts that ability to understand that people communicate with persons but act on objects is precursor to infants' understanding at 9 to…

Interviewed preschoolers about straightforward exclusion and inclusion for two gender stereotypic peer-group contexts: activities and role-play. Found that all children evaluated straightforward exclusion based on gender as wrong and used moral reasons. Preliminary inclusion decisions in the activity contexts were based on stereotypic…

Examined longitudinal community data to test whether body-image and eating disturbances partially explain increased depression in adolescent girls. Found that initial pressure to be thin, thin-ideal internalization, body dissatisfaction, dieting, and bulimic symptoms predicted subsequent increased depressive symptoms. There was also prospective…

Used interview data from a community study to test whether early menarche partially accounts for increased depression, eating pathology, substance abuse, and comorbid psychopathology among adolescent girls. Found that menarche prior to 11.6 years related to elevated depression and substance abuse. Findings support assertion that early menarche is…

Investigated in 3 studies whether 2- to 4-year-olds make accurate causal inferences on the basis of patterns of variation and covariation. Found that all three age groups considered information from various patterns of variation and covariation in judgments regarding two objects and activation of a machine. Three- and 4-year-olds used the…

Tested in three studies a pragmatic explanation for children's tendency to choose an unfamiliar rather than familiar object when asked to find the referent of a novel name. Found that 3-year-olds responded to requests for referent of a novel label and a novel fact the same way. Shared knowledge between speaker and listener influenced children's…