This study focused on assessing the concurrent validity of Horney's ideas about the personalities of hypercompetitive individuals based on her theory of neurosis. One hundred and sixty university men and women provided data by responding to a test battery of personality inventories containing measures of hypercompetitive attitudes and several theoretically relevant constructs. The results strongly support Horney's contentions. Stepwise multiple regression analysis indicated that hypercompetitive individuals were high in narcissism, Type E orientation, and several aspects of sensation seeking. The discussion centered on hypercompetitiveness as a mental health problem in American society and on the scale's utility in the diagnosis of the problem and in the assessment of therapeutic change in clients.