A comparison of voucher-delivery schedules for the initiation of cocaine abstinence

Christopher J. Correia, Stacey C. Sigmon, Kenneth Silverman, George Bigelow, Maxine L. Stitzer

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Studies on the use of shaping procedures to increase rates of cocaine abstinence have produced promising results. This study used a Brief Abstinence Test to examine the impact of reinforcement for initial reductions in cocaine use on a subsequent abstinence reinforcement test. Methadone maintenance patients showing evidence of cocaine use were exposed to two 1-week reinforcement conditions. During the shaping condition, participants could earn $50 vouchers on Wednesday and Friday for meeting quantitative urinalysis criteria and a $100 voucher on the following Monday for meeting the more stringent qualitative criteria. During the terminal condition, only the $100 earning opportunity for meeting the qualitative criteria was provided. Participants were more likely to meet the qualitative reinforcement criteria on Wednesday and Friday in the shaping condition than in the terminal condition. However, contrary to the initial hypothesis, the shaping reinforcement condition did not increase rates of abstinence on the final abstinence test.

Original languageEnglish (US)
Pages (from-to)253-258
Number of pages6
JournalExperimental and clinical psychopharmacology
Issue number3
StatePublished - Aug 2005


  • Cocaine
  • Contingency management
  • Reinforcement
  • Vouchers

ASJC Scopus subject areas

  • Pharmacology
  • Psychiatry and Mental health
  • Pharmacology (medical)


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