We investigated adolescent responsibility across 2 developmental contexts, home and an afterschool program. Longitudinal data were collected from 355 ethnically diverse 11-20-year-old adolescents (M = 15.49; 55.9% female) in 14 project-based programs. Youth rated their responsibility in the program and at home at 4 time points; parents and leaders…

Although spending time in criminogenic settings is increasingly recognized as an explanation for adolescent delinquency, little is known about its determinants. The current study aims to examine the extent to which (change in) self-control and (change in) delinquent attitudes relate to (change in) time spent in criminogenic settings, and the…

In order to enhance our understanding of interindividual differences in academic motivation, the present study examined the interplay of personality, psychosocial adjustment and socio-academic factors in a subsample of adolescent students identified as teacher-and-peer-independent motivation type (MT) (N = 295; M[subscript Age] = 13.71) in…

In order to enhance our understanding of inter-individual differences in scholastic motivation, this study examined if self-determination predicts the school engagement of four different motivation types (MT) in a large sample of adolescent students (N = 1088) from Brandenburg, Germany: (1) peer-dependent MT, (2) teacher-dependent MT, (3)…

Despite consistent evidence that serotonin functioning affects stress reactivity and vulnerability to aggression, research on serotonin gene-stress interactions (G x E) in the development of aggression remains limited. The present study investigated variation in the promoter region of the serotonin transporter gene (5-HTTLPR) as a moderator of the…

The study examined individual factors and social factors that influence adolescent students' achievement in mathematics. The predictive model suggested direct positive effects of student intelligence, self-rated openness and parental education on achievement in mathematics, whereas direct effects of extraversion on measures of achievement were…

Variability in achievement across learners is a hallmark of second language (L2) learning, especially in academic-based learning. The Twins Early Development Study (TEDS), based on a large, population-representative sample in the United Kingdom, provides the first opportunity to examine individual differences in second language achievement in a…

Initiation of drug use and other risky behavior in preadolescence is associated with poor developmental outcomes. In this research, we examine models that ascribe the trajectory to (a) weak executive cognitive function (ECF), (b) early manifestation of externalizing problems, or (c) heightened levels of trait impulsivity. We test the explanatory…

The literature on participant roles in bullying lacks empirical studies that seek to explain what differentiates defenders from outsiders (or passive bystanders). The present study tested a conceptual model in which two personal characteristics of early adolescent students (empathy and perceived social self-efficacy) were considered as possible…

Adolescence is often thought of as a period during which the quality of parent-child interactions can be relatively stressed and conflictual. There are individual differences in this regard, however, with only a modest percent of youths experiencing extremely conflictual relationships with their parents. Nonetheless, there is relatively little…

Using two-level structural equation modeling, examined the dimensionality of socioeconomic status (SES) and its relationship with mathematics and science performance at student and school levels. Data from 13-year-olds from the Third International Mathematics and Science Study show that SES dimensions have different effects on mathematics and…

In a 6-wave longitudinal study, children (Grades 4-6, n=648), adolescents (Grades 7-9, n=1,489), and their parents completed child-adolescent or parent versions of the Children's Depression Inventory (CDI; M. Kovacs, 1981). Using structural equation modeling, the authors conducted latent trait-state analyses to distinguish between a stable trait…

Purpose: To examine substance use differences among African-American adolescents living in rural and more urban areas in Iowa and Georgia and factors thought to be related to those differences. Specifically, negative affect and perceived availability were examined as mediators of the relation between community size and alcohol, tobacco, and drug…

Examined development of child and adolescent self-concept in two overlapping age cohorts as a function of the self-concept domain, social/developmental/educational transitions, and gender. Structural equation modeling addressed questions about stability of individual differences over time. Multilevel modeling addressed questions about mean-level…