جون واطسون
The preceding behaviorisms of Ivan P. Pavlov, Edward L. Thorndike, John B. Watson, B. F. Skinner, and Clark L. Hull studied the basic principles of conditioning with animals. These behaviorists were animal researchers. Their basic approach was that those basic animal principles were to be applied to the explanation of human behavior. They did not have programs for the study of human behavior broadly, and deeply.