During human childhood, brain development and body growth compete for limited metabolic resources, resulting in a trade-off where energy allocated to brain development can decrease as body growth accelerates. This preregistered study explores the relationship between language skills, serving as a proxy for brain development, and body mass index at…

Background: Although research clearly demonstrates the importance of motivation in mathematics learning, relatively little is known about the developmental dynamics between different facets of mathematics motivation and performance, especially in the early years of schooling. Aims: In a longitudinal setting, we examined (1) how children's ability…

Girls, more than boys, experience a decrease in the severity of autism symptoms during childhood. It is unclear, however, which specific autistic behaviors change more for girls than for boys. Trajectories of autism symptoms were evaluated using the Autism Diagnostic Observation Schedule-calibrated severity scores (ADOS-CSS). Change in the…

The extent to which Theory of Mind (ToM) performance is influenced by cultural and gender differences remains a subject of debate. A sample of 324 Dutch and 511 Italian children (52% boys; 2.8-11.7 years; 50% boys; 2.6-10.3 years; respectively) was administered the ToM Storybooks. Analysis focused on indicators of nonlinearity: moving standard…

The results of studies on early competences suggest that the child's delay of gratification (DoG) ability is a major predictor of school readiness (SR). However, there are no direct data or convincing explanations as to how DoG translates into preschool children's readiness to commence school education. Aiming at a better understanding of the…

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…

Inhibitory control has been widely studied in association with social and academic adjustment. However, prior studies have generally overlooked the potential heterotypic continuity of inhibitory control and how this could affect assessment and understanding of its development. In the present study, we systematically considered heterotypic…

Aim: To investigate developmental trajectories in early childhood and predictors of class assignment. Methods: Data were available for Gen2 infants at 12 (n = 2275), 24 (n = 1845) and 36 (n = 2110) months of age in the Raine Study. Latent growth class analysis was used to identify developmental trajectories based on the Ages and Stages…

Caregivers' sensitive responses to infant cry have long-term consequences for adaptive child development. Although mounting evidence suggests that parents who experience high emotionality to infant cry respond less sensitively to infant cry, there is a dearth of knowledge on potential mechanisms underlying individual differences in emotionality to…

Today's children are born into a digital world and are exposed to various electronic devices and digital contents both in the home environment and other environments since the first years of life. Children, who are a natural recipient of the environment in which they live, are exposed to the effects of the digital world at different levels and…

Spatial thinking is an important predictor of mathematics. However, existing data do not determine whether all spatial sub-domains are equally important for mathematics outcomes nor whether mathematics-spatial associations vary through development. This study addresses these questions by exploring the developmental relations between mathematics…

This article proposes a theoretical and empirical approach to studies on contemporary childhood, youth, and adolescence, based on the idea that these categories respond to a modern and hegemonic Western expression of classification that accounts for biologically conditioned stages, through which ethnic, class, and gender particularities influence…

This study examines three parenting behaviors (support, involvement, and harsh control) in predicting children's loneliness and aggression across developmental transitions to adolescence in a Taiwanese sample. Two cohorts (n = 4,990) were followed for 5 years: a younger cohort (first-graders, 51.5%) and an older cohort (fourth-graders). Multilevel…

This study analyzed data on the early developmental status of 7352 children, aged from 36 to 59 months, using the "Early Childhood Developmental Index" (ECDI) to assess literacy-numeracy, physical, social-emotional, and learning domains. The study explored correlates of developmental status with a range of socio-demographic and…

This study explored the development of theory of mind (ToM) in 80 Swedish-speaking 3- to 5-year-olds, a previously unstudied language and culture. The ToM scale was translated and tested in a Swedish context. The results show that the ToM abilities improve significantly with age. In addition, a gender difference was observed for the whole sample,…