Occupational psychology is a somewhat catch-all title for an area which has variously been called industrial psychology, organizational psychology, vocational psychology and personnel psychology. Self-actualization, the reaching of one's full potential, and other slogans gained support of such mainstream psychologists as Carl Rogers and Abraham Maslow. The history of occupational psychology can cynically be seen as a response to the opportunity to make the most out of each current ephemeral cultural fad. Cross-cultural studies are beginning to demonstrate how ethnocentric our theories have hitherto been, and how irrelevant they arc to the needs of developing nations. Only if a broad perspective proves stronger than a parochial professionalism will occupational psychology come into its own. The First World War led to the development of psychometric tests to select for military functions, so the ideological justification and the practical tools were available for the growth of the psychometric testing movement for purposes of occupational selection.