Oberndorf has psycho-analytically studied eight cases of feelings of unreality or depersonalization. In a preponderantly male clientele, six of his cases were in females. This agrees well with the theory that depersonalization depends on an identification with the parent of the opposite sex who happens to personify intellectuality to the patient. He reports portions of the analysis of a case in which thought is identified with a feminine father and activity with a masculine mother. Oberndorf considers that in these cases a bisexual conflict with repression of the type of thinking considered by the patient to be characteristic of the opposite sex is essential. The feeling of unreality he thinks is much more prevalent in neuroses than has been previously recognized.