This meta-analysis examined main effects and heterogeneity in associations between popularity and academic adjustment in the U.S. and China across 41 studies. The aggregated sample included 22,151 children and adolescents (10,934 boys; 11,217 girls) from both countries, with U.S. students from various ethnic backgrounds. Results in the U.S. were…

Australian children aged 6-9 years (N = 120, 71 females; data collected in 2021-2022) were tasked with remembering the locations of 1, 3, 5, and 7 targets hidden under 25 cups on different trials. In the critical test phase, children were provided with a limited number of tokens to allocate across trials, which they could use to mark target…

When making moral judgments of past actions, adults often think counterfactually about what could have been done differently. Considerable evidence suggests that counterfactual thinking emerges around age 6, but it remains unknown how this development influences children's moral judgments. Across two studies, Australian children aged 4-9 (N = 236,…

This 5-year longitudinal study investigated advanced theory-of-mind (AToM) development in 161 German 5- to 10-year-olds (89 females, 72 males). Core aspects of AToM developed nonlinearly, with children reaching a milestone at the age of 7 years, around when they attained the conceptual insight that mental states can be recursive. In late…

Distractibility is the propensity to behaviorally react to irrelevant information. Although children are more distractible the younger they are, the precise contribution of attentional and motor components to distractibility and their developmental trajectories have not been characterized yet. We used a new behavioral paradigm to identify the…

The strategies children employ to selectively attend to different parts of the face may reflect important developmental changes in facial emotion recognition. Using the Moving Window Technique (MWT), children aged 5-12 years and adults ("N" = 129) explored faces with a mouse-controlled window in an emotion recognition task. An…

During childhood and adolescence, increases in heritability and decreases in shared environmental influences have typically been found for cognitive abilities. A sample of more than 2,500 pairs of twins from the Twins Early Development Study was used to investigate whether a similar pattern would be found for science performance from 9 to 12…

Changes in the patterning of adolescents' beliefs about the legitimate domains of parental authority were modeled in 2,611 Chilean adolescents, 11-16 years old. Transitions in adolescents' belief patterns were studied over 3 years. Latent transition analysis (LTA) revealed 3 distinct patterns of beliefs--"parent control," "shared…

Kohlberg's claim that moral development proceeds through an invariant sequence of stages was experimentally examined by attempting to induce regression and stage skipping in fifth- through seventh-grade children. Results supported Kohlberg's claim but also indicated that situations two stages above development were effective in inducing…

A longitudinal study of young children's conceptions of money and its value was conducted among 80 subjects between the ages of 3 and 8 years. The research was conducted within the framework of Piagetian theory using the "critical method." Results demonstrate that the development of the notions under investigation proceeds in six…

Children of the Baka, a preliterate society of Pygmies in southeast Cameroon, were tested for their conception of mind. Several studies conducted in other countries were reviewed. Results provide support for the claim that belief-desire reasoning is universally acquired in childhood. (GLR)

The Sex Stereotype Measure II (SSMII) was developed to assess children's knowledge of conventional, sex-trait stereotypes defined by American university students. The SSMII was administered individually to 5- and 8-year-old children in the United States, England, and Ireland and group administered to 11-year-olds in the United States. (Author/JMB)

Head turning to off-centered sound was videotaped monthly for 13 infants during their first three months of life. (JMB)

Two studies indicate that Oksapmin children progress from premediational to mediational phases in their use of body parts to compare and reproduce number and that this change generally occurs prior to the development of concepts of number conservation. A third study shows that this general change is manifested in culturally specific ways.…

Tested the hypothesis that focusing attention on relative performance will promote ego involvement and undermine intrinsic motivation in school-age children but not in preschoolers who do not have a normative conception of ability. (PCB)