The document summarizes several systematic reviews and studies on the use of motivational interviewing (MI) with offenders and clients in treatment for personality disorders. The reviews found that MI is effective at: 1) Improving retention in substance abuse treatment programs and motivation for change. 2) Potentially reducing substance use, especially when combined with other treatments like contingency management. 3) However, the evidence is mixed on whether MI can reduce recidivism and change offending behavior.