William F. Flack, Jr., Daniel R. Miller, and Morton Wiener What is schizophrenia?l This was the seemingly simple question posed to a diverse group of investigators asked to present their views at a conference sponsored by the Frances L. Hiatt School of Psychology at Clark University, Worcester, Massachusetts, in June, 1990. The plan was to have a small group of theoretically minded clinicians and investigators from different professions and orientations convene to discuss and debate conceptual and metatheoretical issues surrounding "schizophrenia." Instead of concentrating on the latest...