IPI and MMPI predictions of counterproductive job behaviors by racial group

Correctional officers hired by a large urban agency between 1980 and 1985 were administered the Inwald Personality Inventory (IPI) and Minnesota Multiphasic Personality Inventory (MMPI) before being appointed to the job. The 3,349 white, 3,391 black, and 1,547 hispanic male officers were subsequently evaluated on their job status and histories of absence, lateness, and disciplinary interviews. Discriminant function analyses were applied to the IPI and MMPI, alone and together, to assess any race differences in their prediction accuracy for each counterproductive job behavior measure. No significant bias in prediction accuracy was detected, though hispanic males tended to have the highest number of correct predictions. The implementation of prediction equations for these tests would have reduced negative job behaviors by as much as 13%. Analyses of the relative percentages of good performers rated incorrectly were also included.