Adolescent Brief Intensive Group (BIG) BIG is a group that focuses on the impact of drugs and alcohol in the client’s life. The group utilizes substance information and drug education in addition to drug screens and other measures to provide clients with resources to evaluate their drug and alcohol use. During the 6-8 week course, clients learn about the difference between use, abuse and dependence; other topics include identifying triggers, high-risk situations and thinking distortions; dealing with cravings; and more. Group members are required to complete a change plan before graduating from group. Referrals can be made from correctional, educational and familial systems.