Subjective correlations that exaggerate objectively presented contingencies are usually referred to as illusory correlations. An empirical review reveals 3 major paradigms of illusory correlations, drawing on 2 prominent but conflicting gestalt principles, congruency and distinctiveness. Congruency accounts for expectancy-based illusory correlations, whereas distinctiveness is relevant to illusions resulting from the asymmetry of positive and negative attributes and from infrequency. The congruency principle implies a processing advantage for expected stimuli, whereas distinctiveness assumes enhanced processing of unexpected events. This apparent conflict is resolved, and an integrative account is offered within a simple connectionist framework (BIAS) of correlation assessment. The basic algorithm is outlined, empirical findings are simulated, new theoretical distinctions are introduced, and analogies to related paradigms are explained.
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