title: EFFECTS OF REINFORCEMENT SHIFTS ON BENT-WIRE PERFORMANCE OF SEVERLY RETARDED CHILDREN.
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D008607:Intellectual Disability; D011340:Problem Solving; D012054:Reinforcement, Psychology
keywords: ADOLESCENCE; CHILD; MENTAL RETARDATION; PROBLEM SOLVING; REINFORCEMENT (PSYCHOLOGY)