Three studies were conducted to examine what factors were associated with expected bystander intervention across two different contexts (i.e., online and offline), two different age groups (i.e., adolescence and young adulthood) and three different forms of victimization (i.e., general cyberbullying, gender-based cyberbullying, and gender-based…

Guided by the life course perspective, this study investigated the developmental antecedents of contact, closeness/warmth, and negativity in young adults' relationships with their parents. Taking the developmental systems approach, we considered interindividual differences in not only initial levels of parenting quality in early adolescence (Grade…

Thriving is a developmental process that is shaped by previous and current interactions within developmental contexts. We hypothesized that academic performance in the school context will positively predict thriving in young adulthood. Data of N = 2,043 students from Zurich were assessed with standardized tests in Grades 1, 3, 6, and 9. Results…

In this article we present a new method for estimating children's total vocabulary size based on a language corpus in German. We drew a virtual sample of different lexicon sizes from a corpus and let the virtual sample "take" a vocabulary test by comparing whether the items were included in the virtual lexicons or not. This enabled us to…

Organized afterschool activities present great potential to support individuals' positive development. Despite the general findings on the positive role of organized afterschool activities on individual development, existing studies have been limited in multiple ways. They have often focused on the quantity of participation or the amount of time…

Solving simple arithmetic word problems is a major ability that children must acquire throughout the primary-grade mathematics curriculum. However, this skill is often challenging for them. For instance, "unknown referent problems" are more difficult to solve than "unknown compare problems." In unknown compare problems, the…

Effortful control has been proposed as a set of neurocognitive competencies that is relevant to self-regulation and educational attainment (Posner & Rothbart, 2007). This study tested the hypothesis that a multiagent report of adolescents' effortful control (age 17) would be predictive of academic persistence and educational attainment (age…

Background: Aggression is one of the more stable characteristics of child and adolescent development, and violent behavior in early adulthood is often foreshadowed by aggressive behavior in childhood and early adolescence. Considerable evidence has linked coercive family interactions to aggressive behavior in childhood, but less research has been…

Functional literacy is important in both English/language arts and geography. Using the "found poetry" strategy, students will summarize a piece of text, identify main ideas and find geographic connections. While using young adult literature is a great way to incorporate geography into English/language arts classroom, understanding of geography…

We examined associations between adolescent problem trajectories and suicide risk outcomes in 361 community participants. Depressive symptoms (self-report) and externalizing behaviors (parent report) were assessed six times from grades 5 to 10. Parallel process linear growth curves indicated that lifetime suicide attempt history assessed to age 25…

In a sample of 711 ethnically diverse adolescents, the observed interpersonal dynamics of dyadic adolescent friendship interactions were coded to predict early adulthood tobacco, alcohol, and marijuana use. Deviant discussion content within the interactions was coded along with dyadic coregulation (i.e., interpersonal coordination, attention…

Many social interactions require the synchronization--be it automatically or intentionally--of one's own behavior with that of others. Using a dyadic drumming paradigm, the authors delineate lifespan differences in interpersonal action synchronization (IAS). Younger children, older children, younger adults, and older adults in same- and mixed-age…

The authors propose that peer relationships should be included in a life history perspective on adolescent problem behavior. Longitudinal analyses were used to examine deviant peer clustering as the mediating link between attenuated family ties, peer marginalization, and social disadvantage in early adolescence and sexual promiscuity in middle…

In this article, the authors examine whether delayed substance initiation during adolescence, achieved through universal family-focused interventions conducted in middle school, can reduce problematic substance use during young adulthood. Sixth-grade students enrolled in 33 rural midwestern schools and their families were randomly assigned to 3…

This study attempted to assess whether family demographic characteristics and child aggressive behavior are equal to or better than child self-reported depressive symptoms in predicting suicidal behavior. Participants were a community population of African Americans first recruited at age 6 and followed periodically through age 19?20. Measures…