Does prior law enforcement experience affect scores on preemployment psychological testing? An investigation using the MMPI-3.

Most states require that a police candidate's suitability be assessed through preemployment psychological evaluations. Given the psychological stress officers experience in the line of duty, it is possible that experienced candidates would produce scores indicating greater dysfunction on psychological testing relative to inexperienced candidates. No known research has investigated whether police candidates produce different preemployment test scores across experience levels. The present study sought to address this gap in the literature and offer data to guide evaluators' interpretation of test scores for candidates with prior law enforcement (LE) experience. We used a sample of 400 police candidates (18.5% women) evaluated for positions at several LE agencies for whom Minnesota Multiphasic Personality Inventory-3 (MMPI-3) scores were available. Results showed no practically meaningful differences when comparing MMPI-3 scores of candidates with no prior experience, less than 5 years of experience, and 5 or more years of experience. We also compared frequencies at which the three groups elevated MMPI-3 scales at cutoffs specified in Assessing Police and Other Public Safety Personnel Using the MMPI-3: A Practical Guide (Corey & Ben-Porath, 2022) and found minimal differences. Together, these findings indicate that MMPI-3 scores can be interpreted consistently with published guidelines regardless of a candidate's prior LE experience. (PsycInfo Database Record (c) 2022 APA, all rights reserved).