Treatment outcome following intervention in a prison‐based therapeutic community: a study of the relationship between reduction in criminogenic risk and improved psychological well‐being

172 adult male prisoners were assessed before and after intervention in a UK prison‐based therapeutic community using psychometric measures of psychological well‐being and offence‐related risk. All mean scores changed significantly in the expected direction. For men tested after 12 months or more, concurrent changes occurred in both domains. Significant relationships were also found between parole board assessments of risk reduction and psychometric changes. The study suggests that interventions with offenders can target offence‐related risk and mental health as clinically compatible treatment targets. Interventions with offenders may need to focus on improvements in mental health to enhance participants' readiness to address risk.