title: Elimination of subtraction errors by contingent self-correction in retarded children.
mesh_terms: D001521:Behavior Therapy; D002648:Child; D004495:Education of Persons with Intellectual Disabilities; D005260:Female; D006801:Humans; D007859:Learning Disabilities / Q000628:therapy; D008297:Male; D011340:Problem Solving; D012054:Reinforcement, Psychology; D012107:Research Design; D013663:Teaching