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The effects of the modifier and correction indices on MCMI-II profiles
H R Miller1, J O Goldberg, D L Streiner
1Department of Psychology, Hamilton Psychiatric Hospital, Ontario, Canada.
Abstract:
Five modifier and correction indices are used in the Millon Clinical Multiaxial Inventory-II (MCMI-II; Millon, 1987) to improve the sensitivity and specificity of its scales; however, profile analyses indicated that they had little effect on the profiles of 141 psychiatric inpatients. The profiles generated within each MCMI-II section with and without the indices had the same shape and generally showed no significant differences on the various scales. A simple procedure applied to the initial, uncorrected scores provided a good estimate of the final base rate (BR) scores that are obtained when the correction and modifier indices are applied. Examination of individual profiles indicated that the 3-point codetypes were usually the same regardless of whether or not the correction indices were applied. When there were changes, these usually involved changes in rank order; new scales were rarely introduced in a code type. Although the utility of the indices for assessing test-taking attitude remains to be determined, these results argue against their use for modifying BR scores.
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