Cognitive dissonance Aronson's interests and research have paid particular attention to the theory of
cognitive dissonance. Aronson refined the theory, which posits that when attitudes and behaviors are inconsistent (dissonant), psychological discomfort results. This discomfort motivates the person experiencing it to either change the behavior or the attitude so that consonance is restored. In a classic experiment, Aronson demonstrated that people who undergo an embarrassing initiation to gain admission to a group develop more favorable evaluations of the group than people who are admitted after a mild or easy initiation. In Aronson's
Theories of Cognitive Consistency (1973), he states: "Dissonance theory does not rest upon the assumption that man is a rational animal; rather, it suggests that man is a rationalizing animal – that he attempts to appear rational, both to others and to himself."
Jigsaw Classroom Aronson led the development of a classroom technique for defusing inter-group tension and promoting self-esteem. It was discovered that it is rare for classrooms of students to cooperate towards a common goal. In 1971 the newly
desegregated schools of
Austin, Texas faced a crisis of violence between ethnic groups. Aronson, then at the University of Texas, was called in as a consultant by a school administrator who was also a former student. This division of responsibilities means that students are motivated to listen to each other and each of them experiences a role in which they are valuable to others. Comparisons with traditional classroom environments showed that the jigsaw classroom has positive effects on academic performance, self-esteem and attitudes towards other ethnic groups. The technique has since been applied in hundreds of schools across North America.
Pratfall effect Aronson published a paper in 1966, where he described an experiment testing the effects of a simple blunder on perceived attraction. The so-called
pratfall effect is the tendency for attractiveness to increase or decrease after an individual makes a mistake, depending on the individual's perceived competence, or ability to perform well in a general sense. ==Awards and professional recognition==