MMPI Short Forms With Adolescents: Gender Differences in Accuracy

Abstract

The influence of gender on accuracy for eight short forms of the Minnesota Multiphasic Personality Inventory (MMPI) was investigated using a sample of adolescents. MMPI responses from 318 male and 248 female psychiatric patients, aged 12 to 17, were scored for the standard MMPI, Mini-Mult (using two methods; Kincannon, 1968), Midi-Mult (Dean, 1972), two Maxi-Mults (McLachlan, 1974; Spera & Robertson, 1974), Hugo Short Form (Hugo, 1972), Faschingbauer Abbreviated MMPI (FAM; Faschingbauer, 1974), and MMPI-168 (Overall & Gomez-Mont, 1974). Discrepancy values were obtained for all short-form T-scores by subtracting each short-form T-score from its corresponding standard form T-score. These discrepancy values were analyzed using Gender x Short Form repeated measures multivariate analyses of variance (MANOVAs). Because the number of scales varied among the short forms, two separate analyses were performed, one containing all short forms but only the 11 scales that appeared on all short forms and the other containing all scales but only the three short forms that contained all scales. McLachlan's (1974) Maxi-Mult was excluded from the analysis because of its nearly identical statistical properties to Spera and Robertson's (1974) Maxi-Mult. The interaction was significant on most scales in both analyses. Simple-effects breakdowns of the interactions revealed that the accuracy of each short form differed according to gender on several scales, following no consistent pattern. The Midi-Mult and Maxi-Mult are guardedly recommended as the short forms with the lowest number of scales showing a gender difference; however, the reader is cautioned that this difference is still present in more than one third of the scales. Further research on short-form development is advocated.

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