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Abstract
A multitude of special MMPI scales have been developed without sufficient consideration for the methodology of empirical scale construction. Suggestions are presented in this article regarding the selection of items for a new MMPI scale and the tasks needed for the evaluation of a new scale. An investigator who develops a new MMPI scale should consider (a) the need for K corrections of scale scores, and (b) the possibility that the information provided by the special scale can also be obtained from the standard MMPI scales.