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A well-validated test of normal personality functioning is necessary in preemployment evaluations of candidates for public safety positions. In this study, we evaluated the construct validity and predictive validity of one such measure, the Multidimensional Personality Questionnaire (MPQ), in a large sample of candidates for law enforcement positions. We examined associations between MPQ scale scores and biographical data, clinician suitability ratings on the 10 established California Commission on Peace Officer and Standards and Training (POST) psychological screening dimensions, and (for a subsample) posthire performance outcome data. MPQ scores generally demonstrated a conceptually expected pattern of associations with criterion variables, supporting their construct validity. Scores related to negative emotionality were particularly salient predictors of a range of POST-10 suitability ratings. Scales assessing aspects of positive emotionality, impulsivity, as well as absorption, emerged as the best predictors of posthire performance problems.
Sellbom et al. (Wed,) studied this question.