E.S. van Vugt

The effects of physical activity interventions on psychosocial outcomes in adolescents: A meta-analytic review.

Physical activity interventions are often implemented in the adolescent mental health care practice to prevent or treat psychosocial problems. To date, no systematic review of the effect of these physical activity interventions in adolescents has been conducted. In the current study, four multilevel meta-analyses were performed to assess the overall effect of physical activity interventions on externalizing problems, internalizing problems, self-concept, and academic achievement in adolescents. In addition, possible moderating factors were examined. In total, 57 studies reporting on 216 effect sizes were included, and the results showed significant small-to-moderate effects of physical activity interventions on externalizing problems (d=0.320), internalizing problems (d=0.316), self-concept (d=0.297), and academic achievement (d=0.367). Further, moderator analyses showed that outcome, study, sample, and intervention characteristics influenced the effects of physical activity interventions on psychosocial outcomes. Implications for theory and practice concerning the use of physical activity interventions in adolescent mental health care practice are discussed.

Moral judgment, cognitive distortions and implicit theories in young sex offenders

This study focused on moral judgment, cognitive distortions and implicit theories in 77 young sex offenders of whom 56 were child abusers and 21 were peer abusers. The sociomoral reflection measure–short form (SRM-SF) was used to assess moral judgment, and was extended with questions about sexual situations and the offenders’ abuse victim(s). Lower stage moral judgment was only found in peer abusers responding to own victim situations. The Sex With Children (SWCH) scale was used to measure implicit theories, which are beliefs justifying sex with children. No significant differences were found between the child and peer abuser group. Neither significant relations were found between the implicit theories and the level of moral judgment. In addition, all SRM-SF responses were coded according to Barriga and Gibbs’ (1996. Measuring cognitive distortion in antisocial youth: Development and preliminary validation of the ‘How I think’ questionnaire. Psychology Department, 22, 333–343) four-category typology of self-serving cognitive distortions. Cognitive distortions concerning the abuse victim were associated with lower stage moral judgment, but only in the peer abuser group.

The relationship between psychopathy and moral development in young sex offenders

Abstract This study examined the relationship between psychopathic traits and moral development (moral judgement and empathy) in 85 Dutch male sex offenders between 13 and 23 years of age. Questions were asked about general life situations, sexual situations with morally relevant features, and questions about the offenders own abuse victim. A weak negative association was found between psychopathy and mature moral judgement, but only when questions involved the offenders own abuse victim. Weak to moderate negative associations were found between psychopathy and cognitive and affective empathy in general and sexual situations, but not in the own abuse victim situations. Further analysis revealed moderate negative associations between psychopathy and affective empathy in the own abuse victim situations, but only when an unfamiliar victim was involved. This is the first study, to our knowledge, showing that juvenile sex offenders with high levels of psychopathy have context-specific moral deficits, and that in this group both cognitive and affective empathy are related to psychopathy.

Short-Term General Recidivism Risk of Juvenile Sex Offenders: Validation of the Washington State Juvenile Court Prescreen Assessment

It is important to examine whether general risk-assessment instruments developed for nonsex offenders can also be applied to sex offenders, because juvenile sex offenders are much more likely to reoffend with a nonsexual offense than a sexual offense. This study examined to what extent the Washington State Juvenile Court Prescreen Assessment (WSJCPA) can be used to assess the risk for general recidivism among different types of juvenile sex offenders. The predictive validity of the WSJCPA was examined separately for the following subgroups: boys convicted for a misdemeanor sexual offense against a peer (n = 381), boys convicted for a felony sexual offense against a peer (n = 282), boys convicted for a sexual offense against a younger child (n = 521), and girls convicted for a sexual offense (n = 71) and two comparison groups of male (n = 15,155) and female (n = 5,811) juvenile nonsex offenders. The area under the receiver operating characteristic curve scores for general recidivism ranged between .64 and .73. The WSJCPA proved to be at least equally predictive of general offending among juvenile sex and nonsex offenders groups.