Family-based Intervention for Legal System-involved Girls: A Mixed Methods Evaluation.

The increased proportion of juvenile court-involved girls has spurred interest to implement and evaluate services to reduce girls' system involvement. The purpose of this study was to examine the effectiveness of a family-based intervention by using a dominant sequential mixed methods evaluation approach. First, we examined quantitative data using a quasi-experimental design to determine whether the family-based intervention reduced recidivism among court-involved girls. Propensity score matching (PSM) was used to construct statistically equivalent groups to compare one-year recidivism outcomes for girls who received the court-run family-based intervention (n = 181) to a group of girls on probation who did not receive the intervention (n = 803). Qualitative interviews (n = 39) were conducted to contextualize the quantitative findings and highlighted the circumstances that family-focused interventions for court-involved girls. Girls who received the program had slightly lower recidivism rates following the intervention. The qualitative findings contextualized the quasi-experimental results by providing an explanation as to the girls' family circumstances and insights into the mechanisms of the intervention. Results highlighted the importance of family-focused interventions for juvenile justice-involved girls. These findings have practical and policy implications for the use interventions-beyond the individual level-with adjudicated girls and offer suggestions for ways to improve their effectiveness using a community psychology lens. In addition, this paper includes a discussion of evaluating of juvenile court programming from a community psychology perspective including strengths, challenges, and considerations for future work in this area.