title: Covert reinforcement and self-control procedures in systematic desensitization of gagging behavior.
mesh_terms: D000328:Adult; D001521:Behavior Therapy; D003216:Conditioning, Operant; D003887:Desensitization, Psychologic; D005683:Gagging / Q000628:therapy; D006801:Humans; D007092:Imagination; D008297:Male; D012054:Reinforcement, Psychology; D012063:Relaxation; D014839:Vomiting