An initial look at the redundancy of specialized MMPI scales

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Numerous specialized MMPI scales have been developed despite speculation that the information provided by such scales replicates information that can be obtained from the 13 MMPI scales of the standard profile. In the present study with 112 male and 85 female psychiatric patients and 170 male police and fire department job applicants, scores of 3 specialized MMPI scales (the Prejudice scale, the Barron Ego-Strength scale, and the MacAndrew Alcoholism scale) were found to be highly related to the scores of the standard MMPI scales. However, individual scores of the 3 specialized scales could not be accurately predicted from the standard scales. Furthermore, alcoholic and nonalcoholic psychiatric patients were more accurately identified by the 13 standard scales than by the MacAndrew Alcoholism scale. It is concluded that the 3 scales studied appear to provide information not available from the standard MMPI scales. (6 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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