Elevation discrepancies between MMPI-2 clinical and MMPI-2-RF restructured clinical (RC) scales in people with seizure disorders |
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| Institution: | 1. Melbourne School of Psychological Sciences, Redmond Barry Building, University of Melbourne, Victoria 3010, Australia;2. Neuropsychology Unit, Department of Clinical Neurosciences, St. Vincent''s Hospital, Fitzroy, Victoria 3065, Australia;3. Department of Psychology, Kent State University, Kent, OH 44242, USA;1. Department of Mental Health, AUSL Romagna, Ravenna, Italy;2. School of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy;3. Department of Neurosciences, Mario Negri IRCSS, Milan, Italy;4. Alpert Medical School, Brown University, Director of Neuropsychiatry and Behavioral Neurology, Rhode Island Hospital, United States of America;1. Department of Neurosurgery, Epilepsy Surgery Unit, School of Medicine, Evangelismos Hospital, University of Athens, Greece;2. University of Rome G. Marconi, Rome, Italy;1. “Claudio Munari” Epilepsy Surgery Centre, Niguarda Ca'' Granda Hospital, Milan, Italy;2. Neuroscience Department, University of Milan-Bicocca, Milan, Italy |
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| Abstract: | PurposePeople with seizure disorders experience elevated rates of psychopathology, often undiagnosed and untreated. Accurate diagnosis of psychopathology remains an important goal of quality health care for people with seizure disorders. One of the most widely used dimensional measures of psychopathology is the Minnesota Multiphasic Personality Inventory—Second Edition (MMPI-2). Research in heterogeneous mental health samples suggests that the 2008 revision of this measure, the Minnesota Multiphasic Personality Inventory—Second Edition—Restructured Form (MMPI-2-RF), offers better construct fidelity and more cost-effective administration. This study seeks to extend research on MMPI-2-RF scale elevations to a sample of people with seizure disorders.MethodsIn a consecutive, heterogeneous sample of people with seizure disorders, MMPI-2 and MMPI-2-RF scores were compared in terms of categorical classification agreement (clinically elevated versus not clinically elevated). Scores were also compared in terms of variance attributable to diagnosis-specific items, general demoralization, subtle items, social desirability, and demographic factors.Key findingsScores on MMPI-2 and MMPI-2-RF provided a statistically significant level of agreement between corresponding clinical diagnostic scales ranging from 68% to 84%. Most classification disagreement was attributable to MMPI-2 clinical scale elevations when MMPI-2-RF scales were not elevated. Regression analysis supported the interpretation that general demoralization, subtle items, social desirability, and demographic factors led to MMPI-2 clinical scale elevations.SignificanceThe results provide evidence that in the context of strong psychopathology classification agreement, the MMPI-2-RF restructured clinical scales provide better construct fidelity compared with the more trait heterogeneous MMPI-2 clinical scales. These results should encourage clinicians to use the MMPI-2 Restructured Form (MMPI-2-RF) for improved psychopathology assessment compared with the MMPI-2 in patients with seizure disorders. |
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