Use of Incentives to Retain Drug Users in HIV Therapy

The protocol will follow an escalating schedule of reinforcements tied to clinic visit attendance for the first 24 weeks, after which the reinforcers will take the form of an escalating variable reinforcement schedule in the form of fishbowl prize draws linked to maintenance of suppressed viral load for the remainder of the 52-week study period. In addition, a reset function will be incorporated by which the reinforcer will be rolled back to an initial lower value if clinic visits or viral load targets are not met. This will be rapidly scaled up again once targets are met.