functionalism, in psychology, a broad school of thought originating in the U.S. during the late 19th century that attempted to counter the German school of structuralism led by Edward B. Titchener. Functionalists, including psychologists William James and James Rowland Angell, and philosophers George H. Mead, Archibald L. Moore, and John Dewey, stressed the importance of empirical, rational thought over an experimental, trial-and-error philosophy. The group was concerned more with the capability of the mind than with the process of thought. The movement was thus interested primarily in the practical applications of research.
The union between theory and application reached its zenith with John Dewey’s development of a laboratory school at the University of Chicago in 1896 and the publication of his keystone article, “The Reflex Arc Concept in Psychology” (1896), which attacked the philosophy of atomism and the concept of elementarism, including the behavioral theory of stimulus and response. The work of John Dewey and his associates stimulated the progressive-school movement, which attempted to apply functionalist principles to education. In the early and mid-20th century, an offshoot theory emerged: the transactional theory of perception, the central thesis of which is that learning is the key to perceiving.
Although functionalism has never become a formal, prescriptive school, it has served as a historic link in the philosophical evolution linking the structuralist’s concern with the anatomy of the mind to the concentration on the functions of the mind and, later, to the development and growth of behaviourism.