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A Meta-Analysis of Motivational Interviewing: Twenty-Five Years of Empirical Studies.

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Title: A Meta-Analysis of Motivational Interviewing: Twenty-Five Years of Empirical Studies.
Authors: Lundahl, Brad W.1 Brad.Lundahl@socwk.utah.edu, Kunz, Chelsea1, Brownell, Cynthia1, Tollefson, Derrik2, Burke, Brian L.3
Source: Research on Social Work Practice. Mar2010, Vol. 20 Issue 2, p137-160. 24p. 5 Charts.
Subject Terms: *Behavior modification, *Counseling, *Exercise, *Drug abuse, Motivational interviewing, Meta-analysis, Quantitative research, Safe sex, Gambling
Abstract: Objective: The authors investigated the unique contribution motivational interviewing (MI) has on counseling outcomes and how MI compares with other interventions. Method: A total of 119 studies were subjected to a meta-analysis. Targeted outcomes included substance use (tobacco, alcohol, drugs, marijuana), health-related behaviors (diet, exercise, safe sex), gambling, and engagement in treatment variables. Results: Judged against weak comparison groups, MI produced statistically significant, durable results in the small effect range (average g = 0.28). Judged against specific treatments, MI produced nonsignificant results (average g = 0.09). MI was robust across many moderators, although feedback (Motivational Enhancement Therapy [MET]), delivery time, manualization, delivery mode (group vs. individual), and ethnicity moderated outcomes. Conclusions: MI contributes to counseling efforts, and results are influenced by participant and delivery factors. [ABSTRACT FROM AUTHOR]
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Database: Education Research Complete
Description
Abstract:Objective: The authors investigated the unique contribution motivational interviewing (MI) has on counseling outcomes and how MI compares with other interventions. Method: A total of 119 studies were subjected to a meta-analysis. Targeted outcomes included substance use (tobacco, alcohol, drugs, marijuana), health-related behaviors (diet, exercise, safe sex), gambling, and engagement in treatment variables. Results: Judged against weak comparison groups, MI produced statistically significant, durable results in the small effect range (average g = 0.28). Judged against specific treatments, MI produced nonsignificant results (average g = 0.09). MI was robust across many moderators, although feedback (Motivational Enhancement Therapy [MET]), delivery time, manualization, delivery mode (group vs. individual), and ethnicity moderated outcomes. Conclusions: MI contributes to counseling efforts, and results are influenced by participant and delivery factors. [ABSTRACT FROM AUTHOR]
ISSN:10497315
DOI:10.1177/1049731509347850