The overall goal of this research is to improve treatment outcome for marijuana-dependent individuals. We propose to build on the positive findings of the Marijuana Treatment Project which demonstrated the efficacy of an intervention combining two sessions of motivational enhancement therapy with seven sessions of cognitive-behavioral coping skills therapy (MET/CBT). To enhance abstinence over the levels obtained in the prior study, a contingency management procedure will be added to the MET/CBT intervention, providing voucher-based reinforcement for abstinence. This combined intervention will be compared to MET/CBT-only and to contingency-management-only conditions, and to a control group that receives only case management. Recruitment of 248 marijuana-dependent participants will occur over a three-year period. They will be randomly assigned to one of the four 9-session interventions. Treatment will be individual, manualized, and provided on an outpatient basis. Comprehensive pretreatment assessments will provide baseline data against which to compare treatment outcomes. Follow-up assessments, at three-month intervals for one year following treatment, will evaluate marijuana and other drug/alcohol use, and psychosocial functioning in several domains. It is anticipated that the intervention combining contingency management and CBT/MET will result in the best outcomes, and that the contingency management and CBT/MET interventions by themselves will be superior to case management. Data will also be collected to enable study of the processes by which the interventions result in behavior change.

Agency
National Institute of Health (NIH)
Institute
National Institute on Drug Abuse (NIDA)
Type
Research Project (R01)
Project #
5R01DA012728-02
Application #
6378931
Study Section
Human Development Research Subcommittee (NIDA)
Program Officer
Grossman, Debra
Project Start
2000-08-01
Project End
2005-06-30
Budget Start
2001-07-01
Budget End
2002-06-30
Support Year
2
Fiscal Year
2001
Total Cost
$346,410
Indirect Cost
Name
University of Connecticut
Department
Psychiatry
Type
Schools of Medicine
DUNS #
City
Farmington
State
CT
Country
United States
Zip Code
06030
Litt, Mark D; Kadden, Ronald M (2015) Willpower versus ""skillpower"": Examining how self-efficacy works in treatment for marijuana dependence. Psychol Addict Behav 29:532-40
Litt, Mark D; Kadden, Ronald M; Petry, Nancy M (2013) Behavioral treatment for marijuana dependence: randomized trial of contingency management and self-efficacy enhancement. Addict Behav 38:1764-75
Litt, Mark D; Kadden, Ronald M; Tennen, Howard (2012) The nature of coping in treatment for marijuana dependence: latent structure and validation of the Coping Strategies Scale. Psychol Addict Behav 26:791-800
Kadden, Ronald M; Litt, Mark D (2011) The role of self-efficacy in the treatment of substance use disorders. Addict Behav 36:1120-6
Kadden, Ronald M; Litt, Mark D; Kabela-Cormier, Elise et al. (2009) Increased drinking in a trial of treatments for marijuana dependence: substance substitution? Drug Alcohol Depend 105:168-71
Petry, Nancy M; Lewis, Marilyn W; Ostvik-White, Elin M (2008) Participation in religious activities during contingency management interventions is associated with substance use treatment outcomes. Am J Addict 17:408-13
Litt, Mark D; Kadden, Ronald M; Kabela-Cormier, Elise et al. (2008) Coping skills training and contingency management treatments for marijuana dependence: exploring mechanisms of behavior change. Addiction 103:638-48
Kadden, Ronald M; Litt, Mark D; Kabela-Cormier, Elise et al. (2007) Abstinence rates following behavioral treatments for marijuana dependence. Addict Behav 32:1220-36