Teen Marijuana Check-Up

Summary

This study will test a behavioral intervention tailored for adolescents who smoke marijuana and have concerns about their use. The study's purpose is to determine whether this intervention (two-sessions of motivational enhancement intervention followed by 12 months of optional skills training) will be more effective in reducing the use of this drug if augmented by three periodic motivational enhancement treatment check-in sessions as compared to three periodic computer-based check-in sessions.

HYPOTHESES: (1) Participants in the motivational enhancement treatment check-ins (MCI) condition will reduce their use of marijuana more than participants in the computer based (Comp) condition and report fewer negative consequences. These differences are expected to be greater at later follow-ups (i.e, 9, 12, and 15 months) after repeated check-ins exert a cumulative effect. (2)Engagement in CBT sessions will be greater for those in the MCI condition and will partially mediate the effect on marijuana related outcome indices. (3) The MCI intervention will lead to increased self-efficacy, and decreased normative perceptions of marijuana use by other teens that will also partially mediate the effect of the intervention.

Conditions

• Cannabis Use Disorder

Interventions

BEHAVIORAL

Marijuana Check-Ins

The MCI, an MET intervention, will include the provision of personalized feedback with a motivational interviewing style. The focus of these sessions will be individualized to participants based on recent marijuana use and related experiences. Feedback given to participants during the MCI session will review progress toward goals as self-reported in percent days abstinent, normative data regarding marijuana use, review of reported consequences of marijuana use, review of abuse and dependence criteria reported, comparison of consequences and abuse and dependence symptoms reported over time, review of the positive outcomes from reductions in use, and review of immediate and long-term life goals and how their marijuana goal will affect these. HEs will offer particular encouragement to take advantage of CBT sessions to participants who feel they currently need treatment.

Sponsors & Collaborators

• Virginia Polytechnic Institute and State University

  collaborator OTHER

• National Institute on Drug Abuse (NIDA)

  collaborator NIH

• Denise Walker

  lead OTHER

Principal Investigators

• Denise D Walker, PhD · University of Washington School of Social Work

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

14 Years

Max Age

19 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2011-03-31

Primary Completion

2014-09-30

Completion

2014-09-30