title: A comparison of voucher-delivery schedules for the initiation of cocaine abstinence.
abstract: 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.
authors.affiliation: Department of Psychology, Auburn University, 226 Thach Hall, Auburn, AL 36849, USA. correcj@auburn.edu
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Correia
authors.forename: Stacey C
authors.initials: SC
authors.lastname: Sigmon
authors.forename: Kenneth
authors.initials: K
authors.lastname: Silverman
authors.forename: George
authors.initials: G
authors.lastname: Bigelow
authors.forename: Maxine L
authors.initials: ML
authors.lastname: Stitzer
mesh_terms: D000328:Adult; D019970:Cocaine-Related Disorders / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D008297:Male; D008691:Methadone / Q000008:administration & dosage*; D008875:Middle Aged; D009042:Motivation; D010349:Patient Compliance; D013375:Substance Withdrawal Syndrome
chemical_list: D008691:Methadone