Pilot Trial of Contingency Management for Long-Term Cannabis Abstinence

Inclusion Criteria

• •Male and female adolescents actively enrolled in a middle or high school in the Boston area who are between the ages of 13 and 19 (inclusive);
• •Average use of cannabis at least 3 times per week during the 3 months prior to study enrollment;
• •Cannabis use reported within 7 days of study enrollment;
• •No immediate plan to discontinue cannabis use;
• •Have a parent or legal guardian who is competent and willing to provide written informed consent for the active study phase (if under the age of 18);
• •Competent and willing to provide written informed assent for the active study phase (if under the age of 18);
• •Competent and willing to provide written informed consent (if age 18 or older);
• •Able to communicate in English language;
• •Have a parent/guardian who can communicate in English language;
• •Able to commit to 27 study visits in approximately 6 months;
• •Able to safely participate in the protocol and appropriate for outpatient level of care, in the opinion of the investigator.