The authors compared the MMPI scores of 29 inpatients diagnosed by other authors as having hysterical personality and 21 outpatients diagnosed by the authors as having Briquet's syndrome. The two groups of patients differed significantly in age, on the MMPI lie scale, and on the MMPI hypochondriasis scale but not on any of the other MMPI scales. The authors discuss the implications of these findings for further defining the differences and similarities between hysterical personality and Briquet's syndrome.