The Minnesota Multiphasic Personality Inventory (MMPI) instruments have a longstanding history of clinical applications in neuropsychological settings, and many studies have supported the utility of MMPI-2-Restructured Form scores among specific neuropsychological populations. However, the MMPI-3, a new version of the MMPI, has yet to be studied in a clinical neuropsychological setting. To address this need, we investigated the psychometric properties of MMPI-3 scores using a sample of 197 independent practice outpatient neuropsychology examinees (56.9% women; 80.2% White). Internal consistency coefficients and standard errors of measurement were generally consistent with statistics reported for two comparison groups included in the MMPI-3 Technical Manual, supporting the reliability of MMPI-3 scores. Correlations with external criteria-including presenting problems, neurocognitive, psychological/behavioral, and psychiatric diagnostic variables-supported the convergent and discriminant validity of MMPI-3 scores. Finally, relative risk analyses showed meaningful and theoretically expected findings, supporting the utility of the MMPI-3 in a clinical neuropsychological setting. Practical applications, study limitations, and future research directions are discussed. Public Significance StatementResults of this study support the psychometric properties-reliability, validity, and clinical utility-of Minnesota Multiphasic Personality Inventory-3 scale scores in a clinical neuropsychological setting. A wide range of external criteria were considered, including presenting problems, neurocognitive variables, psychological and behavioral variables, and psychiatric diagnoses.
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