ABSTRACT
Manualized therapy has been criticized as being incompatible with behavior therapy. However, the majority of empirically supported, manual-based therapies utilize basic behavioral principles, such as positive reinforcement, to achieve positive change in the target behavior. Parent-Child Interaction Therapy (PCIT), for example, is a manualized treatment that makes extensive use of the empirically-derived behavioral principles of this paradigm. Understanding how and why these fundamental principles operate is essential when attempting to tailor the program ideographically to meet clients' specific needs. The purpose of this article is to provide a model of understanding and evaluating manualized treatments by beginning with a review of the theory and data-driven principles upon which PCIT is based. As a point of illustration, several of the behavioral principles embedded in PCIT, such as reinforcement, punishment, and stimulus control, are highlighted, and clinically relevant examples are presented.