MMPI profiles and code types of responsible and non-responsible criminal defendants

Compared MMPI profiles and two-point code types of criminal defendants (N = 50) who were pleading a defense of "not responsible due to mental disease or defect." In examining the mean, non-K corrected raw scores, no significant differences were found between those defendants determined responsible and those determined non-responsible on individual MMPI scales. A sign test was computed, treating the clinical scales as matched pairs, and a significant difference was found; the non-responsible group profile was more elevated. Two-point codes were determined for each group member, and the percentages of individuals within each group who had the same two-point codes were calculated. A chi-square test was significant, which indicates that there is an association between the classification of an individual and the two-point code produced. The 8-7 code type was modal for the responsible group, while the 8-6 code type was modal for the non-responsible group. These findings are discussed, and future research directions in this area are suggested.