Head hitting in severely retarded children.
D000203:Activities of Daily Living; D001521:Behavior Therapy; D002648:Child; D002675:Child, Preschool; D003216:Conditioning, Operant; D005247:Feeding Behavior; D006801:Humans; D008607:Intellectual Disability / Q000451:nursing*; D008297:Male; D009048:Motor Skills; D009723:Nurse-Patient Relations; D012054:Reinforcement, Psychology; D012652:Self Mutilation / Q000451:nursing*; D012919:Social Behavior