who has developed a cognitive theory of behavior change
Cognitive behavioral therapy These steps are based on a system created by Kanfer and Saslow.[15] After identifying the behaviors that need changing, whether they be in excess or deficit, and treatment has occurred, the psychologist must identify whether or not the intervention succeeded. For example, "If the goal was to decrease the behavior, then there should be a decrease relative to the baseline. If the critical behavior remains at or above the baseline, then the intervention has failed."[15]
Social psychology The first published study in this area was an experiment in 1898 by Norman Triplett, on the phenomenon of social facilitation.[6] During the 1930s, many Gestalt psychologists, most notably Kurt Lewin, fled to the United States from Nazi Germany. They were instrumental in developing the field as something separate from the behavioral and psychoanalytic schools that were dominant during that time, and social psychology has always maintained the legacy of their interests in perception and cognition. Attitudes and small group phenomena were the most commonly studied topics in this era.[citation needed]