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J Subst Abuse Treat. 2014 Jul;47(1):73-7. doi: 10.1016/j.jsat.2014.03.003. Epub 2014 Mar 12.

Contingency management voucher redemption as an indicator of delayed gratification.

Author information

1
Friends Research Institute, Inc., Los Angeles, California. Electronic address: jfletcher@friendsresearch.org.
2
Friends Research Institute, Inc., Los Angeles, California; Fielding School of Public Health, University of California at Los Angeles, CA.
3
Friends Research Institute, Inc., Los Angeles, California; UCLA Integrated Substance Abuse Programs, Semel Institute for Neuroscience and Human Behavior, University of California at Los Angeles, Los Angeles, California.

Abstract

This prospective analysis tested whether frequency of voucher redemptions during a contingency management (CM) substance use intervention was significantly associated with participants' ongoing substance use. Homeless, substance-dependent men who have sex with men (N=131) were randomized into either a "full" or "lite" voucher-based CM intervention. All participants earned vouchers for attendance and participation; participants in the CM-full condition also received vouchers for substance abstinence and enactment of prosocial and/or health-promoting behaviors. Multivariate longitudinal negative binomial regression analyses (n=118) assessed the association between substance use during the intervention and frequency of voucher redemptions. Participants who used methamphetamine (IRR=0.66; 95% CI=0.44-0.99) and/or opiates (IRR=0.60; 95% CI=0.40-0.99) during the intervention exhibited less time between voucher redemptions than individuals who achieved abstinence from these substances. Voucher redemption logs can be cost-effective and unobtrusive tools for measuring study participants' tendency to delay gratification.

KEYWORDS:

Contingency management; Delayed gratification; Men who have sex with men; Methamphetamine; Opiates

PMID:
24674235
PMCID:
PMC4012746
DOI:
10.1016/j.jsat.2014.03.003
[Indexed for MEDLINE]
Free PMC Article
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