Initiative Description: Adolescents and their parents (N = 259) were randomly assigned to receive either a 2-session adolescent only (BI-A) or a 2-session adolescent and additional parent session (BI-AP). Intervention sessions with the student were typically conducted in the school at the end of the school day. Each brief intervention consists of 60-minute individual sessions delivered with a therapist using a motivational interviewing (MI) style. Sessions 1 and 2, separated by 7–10 days, are identical for the BI-A and BI-AP conditions. The third session (for BI-AP only) involves delivering the same MI interviewing style to the primary parent or guardian.
Study Results: BI-AP resulted in superior outcomes when compared to BI-A. Parental involvement in BI-AP seemed to buffer some of the negative effects associated with a higher severity of symptoms (i.e., dependence) compared to comparably cannabis dependent adolescents who received BI-A.
Reference: Piehler, T. F. & Winters, K. C. (2015). Parental involvement in brief interventions for adolescent marijuana use. Psychology of Addictive Behaviors, 29(3), 512-521. doi: 10.1037/adb0000106
Level of Evidence: Very Good