In this study, we examine whether a nine-lesson sex education intervention, "Get Real: Comprehensive Sex Education That Works," implemented in sixth grade, can reduce the number of adolescents who might otherwise become "early starters" of sexual activity (defined as heterosexual intercourse) by seventh grade. Participants were…

This study examined the associations between various sources of social support and academic achievement. Participants were 313 ethnically diverse students attending a low-income intermediate school in New Zealand (mean age = 11.96 years). They reported on the presence and nature of a relationship with a very important nonparental adult in their…

The current study examined the impact of supportive social relationships (i.e., teacher support, adult support, school relatedness) and peer victimization on middle school students' substance use. Over 3,000 middle school students reported on alcohol, cigarette, and marijuana use, supportive social relationships, and instances in which they were…

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…

Motivation is assumed to influence behaviors via perceived agency over goal pursuits, but empirical research integrating motivation and action-control processes in social development is close to nonexistent. We applied this perspective to the study of early adolescent friendships by examining motivation for and perceived control (ability and…

This study compared the effects of emphasizing moral character development or performance character development at three high-performing, high-poverty urban middle schools. Performance character consists of the qualities that allow individuals to regulate their thoughts and actions in ways that support achievement in a particular endeavor. Moral…

The study deals with the relationship between antisocial behavior in early adolescence and family environment. Sample consisted of 2,856 adolescents (53% girls, mean age 13.5 years, SD = 1.1) from urban areas in the Czech Republic. The Social and Health Assessment (SAHA), a school survey, was used to measure sociodemographic characteristics of the…

This study examines the relationship between peer, family, and community context risk factors and alcohol use; gender is examined as a potential moderator of these relationships. Hierarchical logistic regressions conducted in a sample of 781 seventh grade students found that normative beliefs about peers' alcohol use emerged as the most consistent…

The present study investigates developmental patterns of fear in adolescence. It is based on longitudinal data collected as a part of the European Longitudinal Study of Pregnancy and Childhood (ELSPAC) project. A total of 186 Czech adolescents (43% girls) were assessed repeatedly at the age of 11, 13, and 15 years. The free-response method was…

This study had three goals: (a) assessing the predictive association of externalizing and internalizing behaviors during childhood with sexual onset during early adolescence; (b) examining the interactive link of externalizing and internalizing behaviors with early sexual onset; and (c) investigating the moderating effect of gender in this…

The current study examined how racial and sociobehavioral similarities were associated with friendship stability and friendship quality. Cross-race friends were not significantly similar to each other in peer-nominated shyness/withdrawal, victimization, exclusion, and popularity/sociability. Relative to same-race friends, cross-race friends were…

The current study explored how parental inductions and punitiveness were related to the prosocial moral reasoning through perspective taking and sympathy. Data were collected from three ethnic groups: 106 European American, 202 Mexican American, and 196 Taiwanese fifth and sixth graders (approximately 50% girls). Using structural equation modeling…

The paper introduces a set of four studies focused on adolescents in the Czech Republic. In the first part, authors reflect on the cultural background, the political, social, and psychological factors that have had influence on several generations of adolescents in the period of the communist totalitarian regime. They also describe the social…

Adolescents use media that exposes them to sexual material. This study focused on adolescents in the Czech Republic, a country with relatively high rates of exposure to sexual material (ESM). A sample of adolescents aged 11 to 15 years ("N" = 495) taken from the project EU Kids Online II was examined for predictors of the following:…

This study assessed differences in Parker's typology of perfectionism (healthy perfectionist, unhealthy perfectionist, and nonperfectionist). We compared the results from previous research with follow-up 2005 and 2010 data collected from highly gifted Czech mathematicians aged 12 to 16 years. The study examined whether the same three…