In this study, which will include only buprenorphine maintained opioid-dependent participants, we plan to examine whether computer-delivered CRA produces increases in abstinence over that produced by CM (i.e., voucher incentives) procedures alone. Specifically, this trial will compare computer-delivered CRA with vouchers (with minimal therapist involvement) and voucher incentives alone in a randomized parallel groups design. Participants will be assigned randomly to receive one of two treatments: (1) computer-delivered CRA along with voucher incentives (i.e., CM); or (2) voucher incentives (i.e., CM) alone. Outcome measures will include abstinence, retention, HIV-risk behavior, and cost-effectiveness. We hypothesize that the computer-delivered CRA with CM will be more efficacious than CM.