Borderline personality disorder and the MMPI.

Fourteen patients diagnosed as borderline on the basis of the Diagnostic Interview for Borderlines obtained a mean group profile of 8-2-7 similar in configuration, but more elevated than that obtained by a group of 7 diagnostically heterogeneous controls. The borderline patients manifested significantly greater hypochondriasis, depression and hysteria, slightly more schizotypal features, a more deviant self-presentation, and lesser defensiveness. However, considerable heterogeneity in symptomatology was found within the borderline subsample. Further, clinical scales comprised of a higher proportion of relatively subtle and presumably less structured items did not discriminate borderline from control patients more effectively than did those scales made up of a lower proportion of such items. The results offer partial support for the construct validity of the borderline syndrome and for the usefulness of the MMPI in differentiating it from other psychiatric disorders.