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The specific technique used in CBT to treat OCD is called Exposure and Ritual Prevention (also known as Exposure and Response Prevention) or ERP; this involves gradually learning to tolerate the anxiety associated with not performing the ritual behavior. At first, for example, someone might touch something only very mildly "contaminated" (such as a tissue that has been touched by another tissue that has been touched by the end of a toothpick that has touched a book that came from a "contaminated" location, such as a school.) That is the "exposure." The "ritual prevention" is not washing. Another example might be leaving the house and checking the lock only once (exposure) without going back and checking again (ritual prevention). The person fairly quickly habituates to the (formerly) anxiety-producing situation and discovers that their anxiety level has dropped considerably; they can then progress to touching something more "contaminated" or not checking the lock at all — again, without performing the ritual behavior of washing or checking.
- Waite, P & Williams, T. (2009), Obsesive compulsive disorder: Cognitive behavior therapy with children and young people. London:Routledge.