The main reason for the persistence of many illusory correlations is the fact that

Question

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Illusory correlations persist because people selectively remember facts that support their expectations. This occurs because people are more likely to attend to and remember information that confirms their pre-existing beliefs or expectations. As a result, they may overlook or forget information that contradicts their beliefs, leading them to continue to perceive a correlation where none actually exists.

The Main Reason for the Persistence of Many Illusory Correlations