Ultimate attribution error

The ultimate attribution error is a type of attribution error which describes how attributions of outgroup behavior are more negative than ingroup behavior. As a cognitive bias, the error results in negative outgroup behavior being more likely to be attributed to factors internal and specific to the actor, such as personality, and the attribution of negative ingroup behavior to external factors such as luck or circumstance. The bias reinforces negative stereotypes and prejudice about the outgroup and favouritism of the ingroup through positive stereotypes. The theory also extends to the bias that positive acts performed by ingroup members are more likely a result of their personality.

Four categories have been identified that describe the negative attribution of positive outgroup behaviour. First, that the outgroup member is an exception to a general rule; second, that the member was lucky or had specific advantages; third, that the member was highly motivated; and lastly that the behaviour as attributable to situational causes.

The concept and term originates in an article by Thomas F. Pettigrew in 1979 as an extension of the fundamental attribution error which was identified in 1958. Since its publication, which at the time lacked a strong empirical basis, there has been some support for the theory. The specific categorisation originally proposed had only some empirical support for broader categories of motivational and cognitive attribution. The bias is related to intergroup attribution bias.