of epistemology (theories of knowledge), the cognitive sciences, and psychotherapy. The proliferation and pervasiveness of what some have called "cognitivism" throughout all quarters of modern psychology repre­ sent a phenomenon of paradigmatic proportions. The (re-)emergence of cognitive concepts and perspectives-whether portrayed as revo­ lutionary (reactive) or evolutionary (developmental) in nature-marks what may well be the single most formative theme in late twentieth­ century psychology. Skeptics of the cognitive movement, if it may be so called, can readily note the necessary limits and liabilities of naive forms of metaphysics and mentalism. The history of human ideas is writ large in the polarities of "in here" and "out there"-from Plato, Pythagoras, and Kant to Locke, Bacon, and Watson.