The (even) bolder model. The clinical psychologist as metaphysician-scientist-practitioner.

Is the clinical psychologist best characterized as a scientist-practitioner? Or does the practice of science and psychotherapy involve metaphysics to such an extent that the clinical psychologist ought to be considered a metaphysician-scientist-practitioner? To answer these questions, the roles, if any, of metaphysics in science and psychotherapy are examined. This article investigates this question by examining the views of the logical positivists, Karl Popper and Imre Lakatos, and concludes that the practice of science and psychotherapy involves metaphysics in (a) problem choice, (b) research and therapy design, (c) observation statements, (d) resolving the Duhemian problem, and (e) modifying hypotheses to encompass anomalous results.