Moderation and mediation models of religiosity and effortful control as predictors of tobacco and alcohol use were tested in this 2‐year longitudinal study of 563 16‐year‐old Muslim Indonesian adolescents. Adolescents reported their effortful control, religiosity, and tobacco and alcohol use and peers provided reports of adolescents’ effortful control. Although both moderation and mediation effects emerged when predicting Year 2 substance use, predictions of change from Year 1 to Year 2 substance use yielded effects of moderation for peer‐ but not self‐reported effortful control for boys; no mediation effects emerged. These findings provide evidence of interconnections between effortful control and religiosity as predictors of substance use and suggest the need for further longitudinal studies that compare moderation and mediation models.

We investigated how sibling status and sex of younger siblings influence Chinese adolescents' relationships with their fathers and mothers as a function of resource dilution and preference for sons. The sample included 1,093 adolescents from the 8th grade (Mage = 13.96 years, SD = 0.75 years; 47% girls) and the 11th grade (Mage = 17.25 years, SD = 0.74 years; 57% girls) in a longitudinal study. Consistent with expectations pertaining to the hypothesis of resource dilution and son preference in combination, girls with a younger brother reported less positive relationships with mothers than either singleton girls or girls with a younger sister. No significant difference was found between singleton boys and boys with a younger sibling. The current findings show implications that the resource‐dilution theory and son preference culture together may place girls with a younger brother in an unfavorable condition of resource allocation.

This two‐wave longitudinal study examined peer selection and influence pertaining to tobacco and alcohol use by adolescents and their friends in a sample of 854 Chinese adolescents (384 girls: mean age = 13.33 years). Participants nominated friends and self‐reported their tobacco and alcohol use at seventh and again at eighth grade. Longitudinal social network analyses revealed evidence of friend influence but not selection over smoking and drinking. Boys increased their levels of smoking at rates greater than that of girls, but no sex moderation of either selection or influence was found. In interpreting these results, it is important to understand the gender norms for Chinese boys and girls and the cultural context of tobacco and alcohol use.

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This longitudinal study was initiated to assess the predictors of peer- and teacher-identified Chinese adolescent leaders. Participants were 764 8th grade (14.42 years, 348 girls) and 783 11th grade (17.67 years, 427 girls) students that completed two waves of data collection separated by 1 year. Prosocial behavior, aggression, and the interaction between aggression and effortful control concurrently and longitudinally predicted peer- and teacher-identified leadership. A person-centered analysis revealed that 56.8% of the peer-identified and 37.6% of the teacher-identified leaders exhibited both prosocial and aggressive behavior. Consistent with Confucian ideas, prosocial behavior was strongly associated with leadership in both the variable- and person-centered analyses. These results suggest that the bistrategic model in conjunction with effortful control may be useful for understanding youth leadership contextualized within cultural norms.