E xposure therapy has been demonstrated as a highly efficacious intervention, used primarily in the treatment of anxiety and obsessive-compulsive disorders (McKay, 2016) and posttraumatic stress disorder (PTSD; Courtois et al., 2017). Its application has been evaluated as a stand-alone intervention and as a component of a broader program of cognitive behavioral therapy (CBT). This chapter has the following aims: first, to briefly review the history and underlying theory of exposure therapy; second, to provide a description of the primary procedures in exposure; third, to summarize the outcome data associated with the approach and highlight the mechanisms of change; and finally, to cover the application of exposure to diverse populations. 1 The chapter concludes with future directions in the applications of exposure therapy.
HISTORYExposure as a method for reducing anxiety is predicted from the original experimental work of Pavlov (summarized in Pavlov, 1927). Specifically, with repeated presentation of a conditioned stimulus in the absence of the unconditioned stimulus, the conditioned response should weaken and ultimately result in habituation. Application of this procedure implies, however, that the individual will experience an adverse emotional state en route to experiencing relief. Accordingly, proper application requires gradual presentation of portions 1 Clinical examples are disguised to protect patient confidentiality.