Organized extracurricular activities (EAs) are an important component of the microsystem that impacts children's lives. Previous literature has primarily focused on school-aged children and youth in Western societies. This study utilized a longitudinal design and examined the antecedents and consequences of extracurricular participation in a sample of 194 Hong Kong Chinese preschoolers. The results showed that higher family socioeconomic status (SES) predicted higher levels of participation in EAs (e.g., attendance intensity and the breadth of participation). Children from higher-SES families were more likely to involve in non-academic-oriented EAs. Participation in EAs was generally associated with the growth trajectories of reading and math skills in children from less advantaged SES backgrounds, but not higher-SES children. In contrast, EA participation was not associated with children's social skills. Findings highlight the importance of examining the relationship between EA participation and children's early development in non-Western societies. Copyright ©Elsevier Ltd.

This study examined early development of cool and hot self-regulation and how they were related to Chinese preschoolers' early achievement. A total of 951 children (448 girls) aged three to five in Hong Kong participated in this study. Children's self-regulation was assessed with a battery of five tasks tapping either cool or hot self-regulation; early child development was assessed with items selected from the Hong Kong Early Child Development Scales. Mothers reported children's behaviors according to items selected from the Strengths and Difficulties Questionnaire to understand children's emotional and behavior problems. The results identified a complex relationship between cool and hot self-regulation and cool and hot self-regulation were also found to predict children's achievement differently. These findings suggest the unique role of cool and hot self-regulation in early years and the importance of integrating both the cool and hot aspects of self-regulation in the research and practice arenas. Copyright © 2020 Informa UK Limited, trading as Taylor & Francis Group.