Illusory Correlation

What is an illusory correlation?

An illusory correlation is a perceived relationship that is absent or weaker than a person believes. Salient examples can make two events seem linked even when the full pattern of observations does not justify that conclusion.

What does the research show?

Hamilton and Gifford (1976) studied whether infrequent behaviors and membership in a less frequently encountered group would be remembered as occurring together too often. Their experiments supported this route to distorted group judgments. It is one way stereotypes can develop, rather than an explanation for every stereotype.

What is an illusory correlation example?

Imagine seeing a few memorable errors by a small team and concluding that its members are unusually unreliable without comparing errors relative to the number of opportunities in each team. The apparent connection might disappear in the complete data. A few memorable mistakes are not the same thing as a higher error rate.

Illusory correlation in AP Psychology

For AP Psychology, the key idea is a perceived association that the observations do not support. Pay attention to distinctive events: an unusual behavior by a member of a small group can be especially memorable, encouraging someone to overestimate how often the two occur together.

How is the claim checked?

Compare occurrences and non-occurrences across all relevant cases, including denominators. An absence of causal evidence does not itself show that a correlation is illusory: an association can be real without one variable causing the other.