Vouchers vs. Prizes for Cocaine-Dependent Methadone Patients - 2

Inclusion criteria:

• age > 18 years
• current DSM-IV diagnosis of cocaine dependence
• received methadone treatment at the clinic for at least 3 months
• on a stable dose of methadone (no changes in dosing) for at least one month and not presently requesting a dose alteration
• submitted one or more clinic-collected cocaine positive urine samples in the previous 3 months
• English speaking
• pass a brief quiz related to understanding of the informed consent form

Exclusion criteria:

• have a serious, uncontrolled psychiatric illness (e.g., acute schizophrenia, bipolar disorder, severe or psychotic major depression, or suicide risk)
• have dementia (<23 on the Mini Mental State Exam; Folstein et al. 1975)
• are in recovery from pathological gambling