This document discusses behaviorism and several of its key theorists. It explains that behaviorism was developed during the modernism period and focused on scientifically predicting and controlling human behavior through reinforcement and conditioning rather than independent thinking. It profiles B.F. Skinner, Ivan Pavlov, and Alfred Bandura, describing some of their classic experiments in operant conditioning using animals. Pavlov's dogs are discussed as the origin of classical conditioning. Bandura expanded this area through social cognitive theory which examined observational learning and self-efficacy.