title: Processes of fear reduction in systematic desensitization: animal studies.
mesh_terms: D000818:Animals; D001007:Anxiety; D001362:Avoidance Learning; D001521:Behavior Therapy; D003213:Conditioning, Psychological; D005108:Extinction, Psychological; D005239:Fear; D006801:Humans; D011582:Psychological Theory; D051381:Rats; D012054:Reinforcement, Psychology; D012063:Relaxation; D013997:Time Factors