We have developed a new parenting group based on National Institute for Health and Clinical Excellence guidelines for parenting groups for conduct disorder and the Solihull Approach, a multi-agency approach to improve the parent-child relationship and behaviour management. Our aims were to create a parenting group that was theoretically coherent, of proven effectiveness, time efficient, for uni...

Past research investigating the structure of conduct disorder (CD) symptoms has provided evidence of a phenotypic distinction between aggressive and rule-breaking subfactors of CD. However, evidence of etiologic distinctions between these subfactors has not been reported to date. In the current study, the authors investigated this issue in a sample of 1,151 male twins who were 17 years of age. ...

The etiology of conduct disorder (CD) was examined retrospectively in a sample of 2,682 male, female, and unlike-sex adult twin pairs from the community-based Australian Twin Register. Model-fitting analyses indicated a substantial genetic influence on risk for CD, accounting for 71% of the variance (95% confidence interval [CI] = 32-79%). There was not a statistically significant effect of the...

The validity of the Dutch adaptation of the Buss-Durkee Hostility Inventory was investigated. On the basis of the ratings of the staff of a residential treatment center for adolescents with conduct disorders, two contrast groups (high versus low aggression) were formed. In all, 67 male adolescents participated in the study. The subscales of the inventory clearly discriminated between the two gr...

Early conduct problems have been linked to early marijuana use in adolescence. The present study examines this association in a sample of 1,076 college students that was divided into three groups: 1) early marijuana users (began marijuana use prior to age 15; n=126), 2) late marijuana users (began marijuana use at or after age 15; n=607), and 3) non-users (never used marijuana; n=343). A conduc...