Clinical Behavior Analysis is one of several ABA subspecialty fact sheets produced by the BACB in partnership with subject matter experts (SMEs). Clinical behavior analysis (CBA; also called clinical behaviour analysis or third-generation behavior therapy) is the clinical application of behavior analysis (ABA). CBA represents a movement in behavior therapy away from methodological behaviorism and back toward radical behaviorism and the use of functional analytic models of verbal behavior—particularly, relational frame theory (RFT).