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The hypothesis that cognitive simplicity is positively related to prejudice was tested indirectly with data on college students. The relation of tolerance (measured by questions regarding desegregation of the campus) to both accuracy and similarity in perceiving the attitudes of others (measured on Crespi thermometers) was evaluated by Student's t-test. Intolerant students were less accurate in predicting the responses of others and showed a greater tendency to perceive others' responses as like their own.
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Koenig et al. (1962) studied this question.
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