This document discusses behavior therapy, including its definition, origins, assumptions, use of the scientific method, and empirical findings. Behavior therapy focuses on observable behaviors rather than assumed inner causes, and aims to modify maladaptive behaviors through learning principles. It establishes specific treatment goals, rejects concepts of traits, and adapts to clients' problems. Behavior therapy emphasizes present behaviors and seeks experimental evidence. Assessment tools are used to evaluate behaviors. Ethical guidelines were established for behavior therapy interventions.