The effect of MMPI-2 on scoring of special scales derived from MMPI-1

Twenty-nine special scales derived from the Minnesota Multiphasic Personality Inventory (MMPI-1; Hathaway & McKinley, 1983) were scored from MMPI-I and MMPI++-2 (Hathaway et al., 1989) items for a normal and a psychiatric sample. Resulting pairs of mean scores were compared. Absolute differences were found to be small but statistically significant. We concluded that, despite the statistical significance, the small absolute differences suggest that most of the MMPI-I special scales probably can be scored and interpreted from MMPI-2 items. Further research along this line is necessary.