Social desirability scores on the Edwards SD Scale and on a specially devised Rorschach SD Scale for a group of mental patients were compared to test the hypothesis that the social desirability variable is a response tendency consistently influential throughout the range of structured to unstructured test stimuli. This hypothesis was not borne out; if anything, an inverse relationship appeared to exist between tendencies to respond in a socially desirable (or undesirable) manner in the more structured personality inventory and the responsiveness seen in the less structured personality tests. Scrutiny of sub-groups indicated that, while none was clearly distinguishable from each other in the social acceptability of their Rorschach content, the social desirability of responses in the inventory type of test was emphasized in character disorders, psychotics, and neurotics in descending order. It was also noted that the viscissitudes of the social desirability variable was of a constrasting nature in the neurotics and character disorders-a tendency to shift from low to high social desirability of responses in inventory and projective tests, respectively, for neurotics, and vice versa for character disorders. REFERENCES 1. EDWARDS, A. L.