Vouchers vs. Prizes for Methadone Patients

Description:
The purpose of this study is to compare voucher-based contingency management (CM) procedures to a lower-cost CM system that provides opportunities to win prizes. Substance dependent outpatients are randomly assigned to (a) standard treatment, (b) standard treatment plus usual magnitude prize CM ($300), (c) standard treatment plus higher magnitude prize CM ($900), or (d) standard treatment plus voucher CM ($900). Urine and breath samples are collected 2-3x/week for 14 weeks. Follow-up interviews are conducted at 1,3,6 and 9 months following intake during which substance use and psychosocial functioning are assessed.