Abstract
Objective Voucher-based Contingency Management (CM) has been shown to be effective in treating cocaine dependence, but the relative impact of extensive voucher purchase guidelines has not been evaluated. Consequently, our objective was to investigate the effect of purchase guidelines on voucher purchases. Methods We evaluated voucher purchases made by 94 cocaine dependent women who were enrolled in a randomized clinical trial of the Community Reinforcement Approach (CRA) versus Twelve-Step Facilitation (TSF), where extensive purchase guidelines were only part of CRA. Results In CRA, 70% of the purchases were consistent with the guidelines offered. The most frequent purchases were for social/recreational activities (30%), the participant's child (non-basic needs; 17%), and household items (15%). There were no significant differences in percentages of purchases between CRA and TSF. Additionally, preliminary findings on the relationship between voucher purchase patterns and cocaine abstinence are presented. Conclusion The findings suggest that extensive purchase guidelines may not be a critical aspect of voucher reward programs.
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