Although early sexual initiation has been linked to negative outcomes, it is unknown whether these effects are causal. In this study, we use propensity score methods to estimate the causal effect of early sexual initiation on young adult sexual risk behaviors and health outcomes using data from the National Longitudinal Study of Adolescent to…

The purpose of this study was to implement group coaching in a school setting and examine the participants' experiences. Participants were all males (age 12-16 years), primarily with a Middle Eastern family background and from a socioeconomically deprived area. A 2-year intervention with regular coaching counselling during school hours was…

Although many studies have documented developmental change in mathematics motivation, little is known about how these trends predict math performance. A sample of 288 participants from the United States reported their perceived math ability, math utility value and math interest in 5th, 7th and 9th grades. Latent growth curve models estimated…

Another historic Montessori essay puts into writing a landmark activity in the middle school world: the school Odyssey trip. This type of trip challenges the group's ability to cooperate around daily living and is combined with the "testimony of the spade" that is so much a part of the archaeology discipline of physical work and study at…

Both autonomy and friendship quality have consistently been associated with adolescent adjustment. To date, the potentially moderating role of peer relationships in the context of autonomy achievement has received less attention. The present study used observational and quantitative data, as well as multiple reporters, to examine interactions…

The present article treats changes in the learning environment of contemporary children as exacerbation of the "childhood crisis." We believe that new research in the field of developmental psychology is required in order to apply cultural-historical theory to new data. The article presents two studies: one of them considers a preschool…

This study presents the development process and initial validation of the NyTid test, a process-oriented movement assessment tool for compulsory school pupils. A sample of 1,260 (627 girls and 633 boys; mean age of 14.39) Swedish school children participated in the study. In the first step, exploratory factor analyses (EFAs) were performed in…

Background/Context: Over the last two decades, school districts in the United States have increasingly allowed students and their families to choose the schools they attend and, at the high school level, the courses they take. While the movement to provide more curricular choice for students and families has accelerated, so, too, has the policy…

Research has found that when compared with civilian students, military-connected students in the United States have more negative mental health outcomes, stemming from the stress of military life events (i.e., deployment). To date, studies on military-connected youth have not examined the role of protective factors within the school environment,…

During adolescence (e.g. ages 13-15) communication and connectedness with peers is an essential part of adolescents' self-formation; mobiles phones are a conduit that maintains both communication and connectedness among adolescents whereby social interactions and connectedness are not limited by place, context or time. To study mobile phone usage…

Parents impact adolescent substance abuse, but sex-specific influences are not well-understood. This study examined parental influences on adolescent drinking behavior in a sample of ninth-grade students (N = 473). Hierarchical regression analyses indicated parental monitoring, disapproval of teen alcohol use, and quality of parent-teen general…

This experimental study examined the efficacy of a multicomponent reading intervention compared to a control condition on the reading comprehension of adolescent students with low reading comprehension (more than 1½ standard deviations below normative sample). Ninth-grade students were randomly assigned to treatment (n = 25) and comparison (n =…

To address a gap in the literature on the impact of healthy relationship programs for teens on the peer facilitators of these programs, three focus groups were conducted with the peer facilitators (N = 49) of a five-week healthy relationship program (Chesterfield Relate), which was provided in two public schools over a two-year period.…

Much research has been conducted to investigate the effects of inquiry-based learning on students' attitude towards science and future involvement in the science field, but few of them conducted in-depth studies including young learners' socio-cognitive background to explore mechanisms which explain how inquiry experiences influence on career…

Threshold concepts are essential ideas about the natural world that present either a barrier or a gateway to a deep understanding of science. Weight, mass, and gravity are threshold concepts that underpin students' abilities to understand important ideas in all fields of science, embodied in the performance expectations in the Next Generation…