The self-regulation model (SRM) is a nine-phase, four-pathway offense process model designed specifically for sexual offenders that is now being applied to the treatment of this group in many settings and jurisdictions. In the present prospective study, we evaluated the validity and utility of the SRM in a sample of 275 adult male sexual offenders treated within the Correctional Service of Canada. Results indicated that participation in treatment resulted in moderate to large sized improvements from pretreatment to posttreatment on a dynamic risk assessment measure and several self-reported treatment targets. These changes were, in some cases, differentially associated with self-regulation pathways, suggesting that offense pathway is a clinically relevant variable when evaluating treatment change and in conceptualizing sexual offender treatment. In terms of outcome, individuals following the approach pathways, particularly the approach-automatic pathway, demonstrated higher failure rates than individuals following avoidant pathways. However, many of these differences were less pronounced when taking risk for recidivism into account. Implications of these findings for the effective assessment and rehabilitation of sexual offenders are discussed.