Parallel Workshops
This process and impact evaluation examines the effectiveness of the Special Treatment Unit – Violent Offending (STU VO) programme in reducing criminogenic risk and enhancing psychological functioning among high-risk violent offenders in Aotearoa New Zealand. The programme is grounded in Cognitive Behavioural Therapy (CBT), the Risk-Need-Responsivity (RNR) model, and culturally responsive practice, aiming to support therapeutic change and reduce reoffending. Quantitative findings from a pre-post analysis of clinical and dynamic risk indicators showed statistically significant improvements in psychological functioning and reductions in dynamic risk following programme completion. To assess broader justice system impacts, a propensity score matched comparison of resentencing rates was conducted at 12- and 24-month follow-up intervals. Programme participants experienced 10% and 12% lower resentencing rates, respectively, compared to matched controls—approximately half the rate observed in the comparison group. These findings suggest meaningful effects at both individual and system levels, reinforcing the value of embedding outcome evaluations into programme delivery. The evaluation also highlights the importance of culturally responsive approaches, particularly for Māori participants, in achieving equitable and effective rehabilitation outcomes.
