MDT provides an empirically based treatment for adolescents with behavioral problems such as anger, oppositional defiant and sexual and physical aggression (Apsche & DiMeo, 2010). It offers therapists a more efficient and timely intervention that positively effects recidivism rates (Apsche, Bass & Murphy, 2004). Based on Cognitive Behavioral Therapy (CBT) (Beck, 1996), Acceptance and Commitment Therapy (ACT) (Hayes, Strosahl, & Wilson, 1999), Dialectical Behavior Therapy (DBT) (Linehan, 1993) and Functional Analytic Therapy (FAP) (Kohlenberg & Tsai, 1993), MDT has surpassed standards of CBT, DBT and Social Skills Training (SST). This article will review essential MDT studies and present the data in a meta- analysis and Cohen's "d" meta-analysis format. (Contains 2 figures and 6 tables.)