A comparison of voucher exchanges between criminal justice involved and noninvolved participants enrolled in voucher-based contingency management drug abuse treatment programs.

This report compares requests for goods or services made by participants in two clinical trials of contingency management for the treatment of substance abuse. One trial was for participants involved with the criminal justice system and one was for participants who were not involved with the criminal justice system. In both trials, participants earned vouchers that could be exchanged for goods or services.