Gordon Allport, addressing the American Psychological Association (APA) as its president in September 1939, observed that psychology, over the preceding 50 years, had divided into its pure and applied aspects. Troland was a socialist, and proposed that a “technology of behavior” be devised to maximize human happiness. In his comprehensive psychological system, Troland proposed a hedonic theory of motivation: Behavior depends on the quantity of pleasure to which it is related. Taken together, Troland and Miles represent the flowering, during this decade, of two persisting areas of psychological applications: consultation on the design of technologies in which human sensory and perceptual characteristics interact with equipment and devices, and the study of the effects of drugs of various kinds on human performance. Within psychiatry, psychology had long had allies, and during the 1930s some powerful ones became associated with psychology and supported its aims to develop a parallel nonmedical psychotherapy system.