A pilot study regarding the feasibility and efficacy of an outpatient treatment program for young adult high-risk offenders (YAHOP)

This pilot study examines whether the Young Adult Habitual Offender Program (YAHOP), an intensive and outpatient program, is related to a reduction in the general risk of recidivism, common forensic symptomology as well as cognitive distortions. The program integrity (PI) was assessed, with the intent to explore the relationship between the level of PI and any changes in several outcome variables. Additionally, the study examines whether participants with a migration background benefitted equally from YAHOP compared to participants with a native Dutch background. The sample comprised n = 90 high-risk young adult offenders. Results show a decrease in general risk of recidivism. The dynamic risk factors delinquent social network, insufficient impulse control, and dysfunctional problem-solving skills also show a decrease, as well as the forensic symptoms of aggression and anger. Effect sizes are small, except for anger, which has a medium effect size. We found no change in cognitive distortions and problematic substance use. YAHOP shows to be responsive and culturally sensitive, as the participants with a migration background show a significant decrease in general risk of recidivism. No moderator analysis was conducted due to an overall low level of program integrity. After improving program integrity, full-scale quantitative research is needed as YAHOP has the potential as a promising desistance program for high-risk offenders, as in this study the 56 non-completers were also included.