Children and adolescents with intellectual and developmental disabilities (IDD) are more likely to engage in challenging and interfering behavior than their typically developing peers, which has been linked to many negative outcomes. The most effective interventions to address challenging and interfering behavior incorporate function-based…

Limited research exists on the effectiveness of in-person workshops to help parents talk about sexuality. This study utilizes a parallel mixed methods design to examine the impact of the "Home Based Adolescent Sexuality Education (B.A.S.E.) for Intellectual Disabilities" workshop with 26 parents of individuals with Down syndrome.…

Background: An adaptation of multisystemic therapy (MST) was piloted to find out whether it would yield better outcomes than standard MST in families where the adolescent not only shows antisocial or delinquent behaviour, but also has an intellectual disability. Method: To establish the comparative effectiveness of MST-ID (n = 55) versus standard…

The present study examined trajectories of adaptive behavior, behavior problems, psychological symptoms, and autism symptoms in adolescents and adults with fragile X syndrome (n = 147) over a three-year period. Adaptive behavior significantly increased over time, particularly for adolescents, and the severity of behavior problems decreased over…