This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.The specific hypotheses to be tested are 1) Implementation of Voucher Based Reinforcement Therapy (VBRT) for youth with Cannabis Use Disorder is feasible and acceptable for both youths and therapists; 2) VBRT for youth produces a reduction of cannabis use during and at the completion of treatment; and 3) VBRT reinforcement for youth enhances a superior reduction of cannabis use relative to the non-reinforcement control condition. The proposed trial follows the guidelines for a preliminary Stage I study developed by the National Institute of Drug Abuse (NIDA) (Rounsaville et al., 2001). The goals of a Stage I project are 1) to determine whether or not a Stage II project is indicated for the therapy examined in a Stage I project, and 2) if so, provide the necessary procedures, manuals, measures, and data needed to support a Stage II application (e.g., effect size estimates). Decision on appropriateness of Stage II project implies that the data generated supports the feasibility and clinical utility of the therapy examined for that condition, and/or behavior that it is designed to treat.
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