The heterogeneity in the developmental trajectories of math motivational beliefs (i.e., expectancies for success and subjective task value beliefs) was examined among Asian and Latinx male and female students from Southern California across Grades 8 through 10 (n = 2,710; 50% female; 85% Latinx; 15% Asian; M[subscript age] = 13.77). By conducting…

The aim of the study was to explore same-sex and opposite-sex friendship functions among 12 to 13- and 16 to 17-year-old Hungarian adolescents (n = 304). To explore perceptions of friendship functions, the McGill Friendship Questionnaire (MFQ, 30 items, 6 factors: stimulating companionship, help, intimacy, reliable alliance, self-validation,…

An emerging body of research documents a relationship between sleep quantity and delinquency during adolescence. Absent from this line of research, however, is an evaluation of whether the associations between sleep duration and different forms of delinquency vary across periods of adolescence and sex. The current study aimed to address this gap…

The aim of the present study was to examine the relationship between moral disengagement, emotion regulation and bullying behavior at school. Participants were 512 adolescents (281 males and 231 females) attending secondary schools in Cyprus. They completed a questionnaire package two times, with a five months period between them. Structural…

Appalachian youth are highconsumers of added dietary sugar and are very sedentary. "Mentoring to be Active" trains teens to deliver a theoretically based program to promote home-based physical activity (PA) and reduce dietary sugar among rural Appalachian youth. For this pre-test/post-test pilot study, 52 seventh graders from two…

Utilizing a person-centered approach, the present study explored two-hundred and sixty-five adolescents' reports of self-disclosure, help, conflict, and conflict resolution with a close friend to investigate variability in profiles of friendship quality, whether gender and gender homophily and ethnicity homophily of friends are associated with…

An earlier trial of a school-based, preventative intervention, HealthWise South Africa, demonstrated some efficacy in preventing adolescent drinking and smoking in the Western Cape, South Africa. This was followed by the current implementation trial, which examined how implementation support conditions influenced adolescent drinking and smoking…

Differences in the frequency and differentiation of anger expression strategies, such as overt and constructive, and interpersonal contexts, such as parents and peers, were examined by sex and age in a community-based sample of 655 Japanese adolescents aged 9 to 16 years. The results revealed significant age-related differences in overt anger…

This study theorizes and tests moderators (perceived availability of marijuana and age-group) of the association between adolescents' frequency of marijuana ad exposure and past-year marijuana use. To test this model, I analyzed national survey data from 9,024 American adolescents with hierarchical regression techniques. Results showed that being…

Students' attainment in mathematics is associated with several personal and contextual factors, but little research has been carried out to explore the intersectionality between them. The current paper aims to fill this gap. Census assessment data collected in Italy at Grade 10 (on average, 15-year-old students) by the Italian national institute…

It is unknown whether sluggish cognitive tempo (SCT) is prospectively associated with depression in adolescence, and possible processes linking SCT to depression remain unexamined. Using a longitudinal study with three timepoints over a two-year period, the current study tested the indirect effects of SCT on depression via peer victimization,…

Background: Rates of PA are low among adolescents living in rural areas. Purpose: The purpose of this study is to measure 1 week of "free-living" PA via accelerometer among 9th- and 10th-grade students who reside in rural Appalachia. A second purpose was to identify gender differences in Social Cognitive Theory (SCT) variables correlated…

The present study investigated the antecedents of cyberbullying victimization and addressed the commonalities and differences between visual and written forms of cyberbullying victimization among 3172 Italian adolescents (51.6% male, M[subscript age] = 13.74 years, SD = 1.70) who participated in the Health Behaviour in School-Aged Children (HBSC,…

The present study used a unique measure of self-perceived gender typicality to better examine the association of gender with cyber victimization and perpetration. Participants were 297 adolescent males and females recruited from independent schools in grade 8 (M[subscript age] = 13.8) and grade 10 (M[subscript age] = 15.8) who completed a…

Typically developing, American adolescents in Grade 10 (n = 38) ranked the relative importance of 14 communication skills in their friends' communication with them. The skills were considered those associated with figurative language (e.g., appropriate slang use), empathy (e.g., vocal tone comprehension), or discourse management (e.g., appropriate…