Effect of subject control and graduated exposure on snake phobias.
D000293:Adolescent; D000328:Adult; D000818:Animals; D001521:Behavior Therapy / Q000379:methods*; D003887:Desensitization, Psychologic / Q000379:methods*; D005246:Feedback; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010698:Phobic Disorders / Q000628:therapy*; D012911:Snakes; D013997:Time Factors