Reviews elements of the respondent, operant, and modeling theories and various principles of the exchange theory that can be combined to facilitate changes in client behavior. Proposes the behavioral exchange model as a framework to help social workers conceptualize clinical phenomena and thus gain power to influence them. (Author/JAC)

Research has shown that adolescent tobacco users are much more likely to progress to illicit drugs than are nonusers. This article suggests potential psychosocial reasons for progression based on principles of learning theory, Theory of Reasoned Action, Health Belief Model, and Cognitive Dissonance. Also discusses neuropharmacologic components to…