MMPI-2 Restructured Form Over-Reporting Scales in First-Episode Psychosis |
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Authors: | Dr Scot E Purdon Stacey M Purser Kim M Goddard |
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Institution: | 1. Alberta Hospital Edmonton Neuropsychology and the Edmonton Early Psychosis Intervention Clinic, Alberta Health Services, and Bebensee Schizophrenia Research Unit, University of Alberta Psychiatry , Alberta, Canada spurdon@ualberta.ca;3. Alberta Hospital Edmonton Neuropsychology and the Edmonton Early Psychosis Intervention Clinic, Alberta Health Services, and Bebensee Schizophrenia Research Unit, University of Alberta Psychiatry , Alberta, Canada |
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Abstract: | MMPI-2-RF over-reporting scales for physical, cognitive, or psychological symptoms were examined in 130 consecutive referrals to a first-episode psychosis (FEP) clinic. Although acutely ill upon presentation, consistent and responsive profiles were obtained in 79% of the sample. There was no indication of under-reporting on defensive scales, and anticipated elevations were observed on clinical scales sensitive to thought disorder, ideas of persecution, and aberrant experiences. The Infrequent Somatic (Fs), Symptom Validity Scale (FBS-r), and Response Bias (RBS) scales did not indicate somatic or cognitive over-reporting, but the Infrequent Psychopathology Scale (Fp-r) showed a moderate elevation that may suggest a propensity for over-reporting or an effect of clinical symptoms on the over-reporting scale. Clinician ratings of positive symptoms of psychosis were related to the Fp-r. Although the over-reporting classifications with the RBS were relatively low, RBS scores were directly related to positive and general symptoms of psychosis. The MMPI-2-RF appears to have clinical value in an acutely ill FEP sample. The sample was not prone to over-reporting pathology, but associations between both the Fp-r and the RBS with clinical symptoms will warrant further investigation. |
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Keywords: | First-episode psychosis Malingering Minnesota Multiphasic Personality Inventory – 2 MMPI-2 Symptom validity Psychopathology |
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