Age group differences in depression on MMPI D scale

Graying of the critical items: effects of aging on responding to MMPI-2 critical items

The relation between age and several critical item sets on the revised Minnesota Multiphasic Personality Inventory (MMPI-2; Butcher, Dahlstrom, Graham, Tellegen, & Kaemmer, 1989) was examined. MMPI-2 protocols from veterans entering a Veterans Affairs domiciliary were obtained, and the number of Grayson critical items, Koss-Butcher critical items. Lachar-Wrobel critical items, and Caldwell critical items were tabulated. Another critical item set consisting of all items of the previously mentioned sets was also tabulated. This composite set was divided into a set that has items scored on Scales 1, 2, and 3, and a second set of items that were not scored on those three scales. The effect of age on Scales L and K was also studied. A one-way analysis of variance confirmed that the number of endorsed critical items was significantly less in older age groups, and L and K increased. The implication is that endorsement of a critical item may have increased clinical significance as a person ages.

MMPI scales and subscales: patterns of older, middle-aged, and younger inpatients

There has been virtually no research on the relationship of age and MMPI subscales, such as the Harris and Lingoes, Wiggins, Subtle/Obvious, and other specialized subscales. One hundred younger (less than or equal to 39), middle-aged (40-49), and older (greater than or equal to 50) psychiatric inpatients were compared on the basic 13 MMPI scales and 77 MMPI subscales. Results showed that, as a whole, older patients tended to respond more conservatively to these scales, to show less pathology, and to endorse fewer subtle/obvious items than the other age groups. They responded, however, lower on Dominance, on Hostility, and on Social Maladjustment. Later-life patients also endorsed differentially many of the Harris and Lingoes 4 and 6 subscales in the less pathological direction than did the other groups.

Age differences in MMPI scale scores from 1,189 psychiatric patients

Investigated age-related differences in MMPI scale scores from 1,189 individuals (ages 20 to 64 years) who were applying for psychiatric treatment. All major scales except L, K, D, and SI showed statistically significant age group differences. In general, older patients had higher scores on HS and HY, while younger patients had higher scores on F, PD, PA, PT, SC, MA. These results underscore the importance of the age of the patient in the clinical interpretation of an individual protocol.