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Elliot Aronson (born January 9, 1932) is an American psychologist who has carried out experiments on the theory of cognitive dissonance, and invented the Jigsaw Classroom, a cooperative teaching technique that facilitates learning while reducing interethnic hostility and prejudice. In his 1972 social psychology textbook, The Social Animal, he stated Aronson's First Law: "People who do crazy things are not necessarily

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