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Related Experiment Videos

Does contingency management affect motivation to change substance use?

David M Ledgerwood1, Nancy M Petry

  • 1Department of Psychiatry, University of Connecticut Health Center, 263 Farmington Ave., Farmington, CT 06030-3944, USA. ledgerwood@psychiatry.uchc.edu

Drug and Alcohol Dependence
|November 29, 2005
PubMed
Summary

Contingency management (CM) did not alter motivation to change substance use in patients. However, CM assignment was linked to longer abstinence durations, suggesting its effectiveness beyond motivation enhancement.

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Area of Science:

  • Psychology
  • Addiction Medicine
  • Behavioral Science

Background:

  • Substance use disorders are a significant public health concern.
  • Contingency management (CM) is an evidence-based intervention for substance use disorders.
  • The impact of CM on motivation to change substance use remains underexplored.

Purpose of the Study:

  • To assess the effect of CM on motivation to change substance use.
  • To examine the relationship between motivation and treatment outcomes.
  • To investigate CM's efficacy in community-based treatment settings.

Main Methods:

  • 115 patients in community treatment clinics were randomized to standard treatment or standard treatment plus CM.
  • Motivation to change was assessed using the University of Rhode Island Change Assessment (URICA) at baseline and 3 months.

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  • Treatment outcomes were measured by longest duration of abstinence (LDA).

    • Main Results:

    • Both CM and standard treatment groups showed decreased motivation scores from pre- to post-treatment.
    • CM did not significantly increase or decrease motivation compared to standard treatment.
    • Pre-treatment motivation did not predict treatment outcome.
    • CM assignment was associated with better LDA.
    • Post-treatment motivation was modestly associated with LDA in some analyses.

    Conclusions:

    • CM does not appear to directly influence motivation to change substance use in outpatients.
    • CM assignment is associated with improved treatment outcomes, specifically longer abstinence.
    • Further research is needed to explore motivation change in CM using diverse assessment tools and populations.