Guided self-change (GSC) treatment has been accepted by American Psychological Association Division 12, Society of Clinical Psychology, as an empirically supported treatment. Guided self-change (GSC) treatment has been accepted by American Psychological Association Division 12, Society of Clinical Psychology, as an empirically supported treatment. GSC is a brief, cognitive-behavioral, motivational intervention developed in the early 1980s. It is a form of brief cognitive behavioral therapy. It was first developed for problem drinkers, but has since then, been researched on several populations (e.g., drug abusers, Spanish-speaking alcohol abuses, adolescents).