U.S. flag

An official website of the United States government, Department of Justice.

NCJRS Virtual Library

The Virtual Library houses over 235,000 criminal justice resources, including all known OJP works.
Click here to search the NCJRS Virtual Library

Cross-Validation Study of Police Recruit Performance as Predicted by the IPI (Inwald Personality Inventory) and MMPI (Minnesota Multiphasic Personality Inventory)

NCJ Number
Journal of Police Science and Administration Volume: 15 Issue: 2 Dated: (June 1987) Pages: 162-169
E J Shusman; R E Inwald; H F Knatz
Date Published
8 pages
A cross-validation study of police trainee performance compared the classification accuracy of the Minnesota Multiphasic Personality Inventory (MMPI) and the Inwald Personality Inventory (IPI) in a sample of 689 male urban police officers who completed a 6-month training academy.
IPI scales alone assigned 61 to 77 percent of the officers to the correct performance group (good versus poor), the MMPI scales correctly identified 50 to 70 percent, and the combined scales correctly classified 64 to 87 percent. IPI items measuring difficulties in previous jobs, suspiciousness of others, and anxiety toward the environment were major discriminators between groups. MMPI measures that discriminated between groups included deviation from societal norms and alcohol use. 5 tables and 24 references.