Systematic desensitization, also known as graduated exposure therapy, is a type of behavior therapy developed by South African psychiatrist, Joseph Wolpe. It is used in the field of clinical psychology to help many people effectively overcome phobias and other anxiety disorders that are based on classical conditioning, and shares the same elements of both cognitive-behavioral therapy and applied behavior analysis. When used by the behavior analysts, it is based on radical behaviorism, as it incorporates counterconditioning principles, such as meditation (a private behavior/covert conditioning) and breathing (which is a public behavior/overt conditioning). From the cognitive psychology perspective, however, cognitions and feelings trigger motor actions.