EFFECTS OF JUSTIFICATION AND A MECHANICAL AID ON JUDGMENT PERFORMANCE

This study examines the effect on judgment performance of an explicit justification requirement and of having available the recommendations of a mechanical judgment aid. The subjects are professional auditors, and the task is the classification of industrial bond issues into rating categories that reflect differential levels of financial quality. It is found that both the justification requirement and the availability of the mechanical aid are associated with significantly greater judgment accuracy which can be traced to significantly greater consistency. Both factors are also associated with significantly greater consensus, or agreement among judges, which can be important when accuracy cannot be assessed. Several directions for further research on justification and judgment aiding in applied contexts are discussed. © 1992.