K-corrected code types are no more valid, and are often less valid, as predictors of correlates in clinical settings. It significantly attenuates individual scale validity in non-clinical settings the detrimental effects are most pronounced in settings in which defensive responding is frequent. The K correction does not improve individual scale validity in any setting. What does research indicate about the K correction? Because all other MMPI-2 scores that aid in the interpretation of the Clinical Scales (the Harris-Lingoes Subscales, Restructured Clinical Scales, Content and Content Component Scales, PSY-5 Scales, and Supplementary Scales) are not K-corrected, they can be compared most directly with non-K-corrected T scores. This information may be particularly helpful when the K score deviates substantially from the average T-score range (65). Non-K-corrected T scores allow interpreters to examine the relative contributions of the Clinical Scale raw score and the K correction to K-corrected Clinical Scale T scores. Research indicates that the K correction does not enhance validity and that in some cases validity is actually attenuated by applying the K correction to the Clinical Scales. Why were non-K-corrected T scores re-introduced in the Extended Score Report? Which MMPI-2 materials contain non-K-corrected T Scores?Īn optional profile of the Validity and Clinical Scales incorporating non-K-corrected T scores is provided in the computerized Extended Score Report, and a hand-scoring Validity and Clinical Scales Profile form for K- and non-K-corrected scores is available. Also, Appendix A of the 2001 MMPI-2 Manual for Administration, Scoring, and Interpretation provides raw score conversion tables for both K- and non-K-corrected T scores. ![]() Not scorable are validity indicators VRIN, TRIN, F B, F p, FBS, and S, the Restructured Clinical (RC) Scales, the Personality-Psychopathology Five (PSY-5) Scales, the Content Scales, and the Supplementary Scales. Scorable are validity indicators L, F, and K, the clinical scales, and the Harris-Lingoes and Si subscales. What scales can be scored if only the first 370 items are administered?
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