Pettigrew's studies of white people in South Africa and the American South in the 1950s revealed that those who conformed most to other social norms were also the most prejudiced.
According to Pettigrew, a research professor of psychology, interaction between people from various racial and ethnic backgrounds significantly lessens prejudice.
The overwhelming majority (94%) of studies supported the fundamental hypothesis that interaction with people from different groups lessens prejudice.
Most crucially, contact lessens bias toward "outsiders" by altering attitudes, which, according to Pettigrew, are the best indicators of intergroup behavior. In contrast to what they believe or the prejudices they hold, having interaction with African Americans, for instance, alters how whites feel about blacks, which, according to him, is a far more accurate predictor of their conduct.
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