The remainder of the book consists of three essays. In a scholarly, well-documented chapter, Michael E. Thase explores the conceptual and theoretical basis for integrating psychotherapy and pharmacotherapy. Applying a narrowly construed standard of research validity—the randomized, double-blind, controlled trial of a defined treatment method—the discussion necessarily focuses on short-term, structured, targeted treatments, such as cognitive-behavioral therapy and interpersonal therapy. Thase realistically discusses the difficulty of carrying out comprehensive research in psychotherapy that would meet such standards and still be relevant to actual clinical practice.