Contingent Reinforcement of Group Participation Versus Abstinence in a Methadone Maintenance Program

Published in: Experimental and Clinical Psychopharmacology, v. 4, no. 3, 1996, p. 315-321

Posted on on January 01, 1996

by Martin Y. Iguchi, Richard J. Lamb, Mark A. Belding, Jerome J. Platt, Stephen D. Husband, Andrew R. Morral

Read More

Access further information on this document at

This article was published outside of RAND. The full text of the article can be found at the link above.

This study compared the effectiveness of 2 types of contingency management interventions on reducing unauthorized drug use among methadone maintenance patients. Take-home medications were used to reinforce either the provision of drug-free urines (UA) or attendance of groups providing training in interpersonal problem solving (TIPS). Newly enrolled patients were randomly assigned to either the TIPS (n = 34) or the UA (n = 32) condition after a 12-week stabilization period. During the course of the 24-week intervention period, UA participants showed greater improvement than TIPS participants in rates of abstinence from unauthorized drugs. Also, a greater proportion of UA participants met a priori criteria for clinical improvement, whereas a greater proportion of TIPS participants met a priori criteria for clinical deterioration. The results support the efficacy of contingency interventions targeted specifically at drug-using behavior.

This report is part of the RAND Corporation External publication series. Many RAND studies are published in peer-reviewed scholarly journals, as chapters in commercial books, or as documents published by other organizations.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.