The Effect of Partner Involvement and Partner Behaviors on Marijuana Treatment Outcomes

The involvement of significant others in substance abuse treatment has been shown to be beneficial in the alcohol and cigarette literatures. However, these findings have not been extended to treatment for other substance abuse, particularly marijuana. This study examined whether partner involvement leads to improved outcomes for people seeking treatment for marijuana abuse. In addition, we examined what possible mechanisms can account for a partner's contribution to positive treatment outcomes. Hypotheses were only partially supported. Treatment conditions did not lead to differential changes in partner behaviors. However, there was some evidence that these partner behaviors do have impact on treatment outcomes. In particular, negative partner behaviors were associated with poorer outcomes.