Merrill Carlsmith
Encyclopedia
J. Merrill Carlsmith was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 social psychologist
Social psychology
Social psychology is the scientific study of how people's thoughts, feelings, and behaviors are influenced by the actual, imagined, or implied presence of others. By this definition, scientific refers to the empirical method of investigation. The terms thoughts, feelings, and behaviors include all...

 perhaps best known for his collaboration with Leon Festinger and Elliot Aronson
Elliot Aronson
Elliot Aronson is an American psychologist. He is listed among the 100 most eminent psychologists of the 20th Century, best known for the invention of the Jigsaw Classroom as a method of reducing interethnic hostility and prejudice; cognitive dissonance research, and influential social psychology...

  in the creation and development of cognitive dissonance theory. He also worked extensively with Mark Lepper
Mark Lepper
Mark R. Lepper is the Albert Ray Lang Professor of psychology at Stanford University, and a leading theorist in social psychology...

 on the subject of attribution theory.
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