Contingency management, often called motivational incentives, is a kind of therapy uses tangible rewards to encourage or motivate patients to achieve desired goals, such as passing a drug test. One kind of contingency management program, voucher-based reinforcement (VBR), gives patients in recovery vouchers that can be exchanged for rewards on the condition of passing a drug test. As a patient accrues more passed drug tests, the value of the vouchers increases. However, the value resets if a patient gets a positive, helping encourage patients to stay drug free.