| This study used archival data to examine psychometric properties of the MMPI in a medical sample composed of patients seeking medical care from physicians for physical complaints, but where no medical problems or physiologies were recorded. Answers to the MMPI were converted to MMPI-2 and MMPI-2-RF formats, and T-scores were calculated for MMPI, MMPI-2, and MMPI-2-RF Scales. Specifically, MMPI Clinical Scales, MMPI-2 Clinical Scales, Revised Clinical Scales, PSY-5 Scales, PSY-5 Revised Scales, MMPI-2-RF Fs Scale, and MMPI-2-RF Somatic/Cognitive Specific Problems Scales were studied. The dataset was evaluated for the presence of the Neurotic Triad. Grouping scales were investigated for correlation properties and other statistical properties, specifically focusing on possible somatization characteristics, and the extent to which MMPI-2 RC Scales were comparable to their MMPI-2 Clinical Scale counterparts, by studying differences between related internal consistency coefficients. Results indicated that the Neurotic Triad was present in these patients with medically unexplained physical symptoms. The highest scales (T ≥ 65) were the MMPI-2-RF Fs, followed by the MMPI-2 Clinical Scales 1, 2, 3, respectively, MMPI-2-RF MLS, RC Scale 1, then three more (T ≥ 62) MMPI-2-RF Specific Problems (Somatic/Cognitive) Scales, GIC, NUC, and HPC, respectively. The MMPI-2 Ss Scale was significant for almost every scale in the study, or 19 out of 23 scales. Gender was significant for seven scales and age was significant for only one scale. The new Infrequency Somatic Responses (Fs) Scale proved to have interesting additional findings with particular significance for the MMPI-2-RF Specific Problems (Somatic/Cognitive) Scales in medical samples.;KEY WORDS: Minnesota Multiphasic Personality Inventory (MMPI), Minnesota Multiphasic Personality Inventory-2 (MMPI-2), Minnesota Multiphasic Personality Inventory-2 Revised Form (MMPI-2-RF), Revised Clinical (RC) Scales, Psychometrics, Somatization, Medical Sample, Archival Data, Prorated norms, Renormed, Recoded, Fs Scale, Ss Scale, Psychology, Personality, Medically Unexplained Physical Symptoms, MMPI, MMPI-2, RC, and MMPI-2-RF. |
