Short form MMPIs in medical consultation accuracy of the Hs-Hy dyad compared to the standard form

Rescored 114 MMPIs of back pain patients, using the FAM and MMPI-168 method to determine whether the Hs-Hy dyad of individual profiles fell into designated diagnostic brackets consistent with the standard form MMPI. The specified categories were T scores greater than 75, T scores between 65-74, T scores less than 65. Overall efficiency for both the FAM and the 168 was 66%. For the extreme scores the efficiency of both short forms ranged from 69 to 85%, but in the moderate range (65-74 T) efficiency fell to 21% and 30% for the FAM and 168, respectively. Differences between the two short forms were non-significant at all levels. Use of short form MMPIs where individual profile analysis is required in medical consultation is discouraged.