This article examines the construct validity of the impostor phenomenon, as measured by the Harvey Impostor Phenomenon Scale (HIPS). A factor analysis was performed on the fourteen scale items, and the results revealed that three factors accounted for 54.7% of the variance. The six items loading into the largest of these factors identify it as an "impostor" factor, whereas the remaining two factors corresponded to feelings of unworthiness and inadequacy. The results point to the potential usefulness of the factoranalyzed HIPS as a measure of the impostor phenomenon and for the general construct validity of the phenomenon.Several psychoanalysts have used the term "impostor" to describe a male who attempts to reconcile the inadequate person he is with the masculine ideals conveyed to him by assuming false identities and by fabricating his achievements. This impostor suffers from a profound impairment of his sense of identity, knows he is not the person he pretends to be, and assumes a false identity for the sole purpose of deceiving others (Chasseguet-Smirgel, 1985;Kaplan, 1984).