E-ISSN : 2733-4538
A comparison was made between the MMPI standard form and the MMPI-168 short form in terms of psychometric qualities in order to confirm the ability of the latter to screen normals from psychiatric cases. Subjects were 300 normals and 298 psychiatric patients of both sexes aged from 13 to 65. Concurrent validity and differences of means and standard deviations of each validity and clinical scales between the two forms of MMPI suggested that there is no significant difference between the two. Discriminant and classification analysis through double cross-validation confirmed than there is no more than 1% difference in the accuracy of classification between the two forms. Therefore, the MMPI-168 short form is found to effectively screen, at least, normals from psychiatric cases instead of the standard MMPI of 566 items.