The application of information integration concepts to judicial, political and moral judgments is discussed. The authors describe how the information integration theory can provide a unitary treatment of judgement on both conception and quantitative levels. The decision-making processes involved in the courtroom setting, political choice, and judgements of morality are compared. The comparison implies that information integration theory provides the conceptual and methodological tools which draw disciplines together into the realm of unitary social judgement. (MPJ)