Motivated augmentation and reduction of the overattribution bias.

Three experiments investigated whether the need to have (or avoid) cognitive closure affects observers' tendency to display attributional bias. Results of each experiment indicate that the overattribution bias was magnified under high need for cognitive closure and attenuated under high need to avoid closure. In Experiments 1 and 3, the relevant motivational state was manipulated situationally, whereas in Experiment 2 an individual-differences measure of the closure motivation was used. These divergent operationalizations yielded convergent results. Furthermore, when in Experiment 3 the task consisted of attributions to the situation, high need for closure augmented, and high need to avoid closure reduced, situational rather than dispositional overattributions. The results imply general motivational boundary conditions for inferential biases across judgmental contents.