title: The significance of stimuli on conservation of number with educable mentally retarded children.
mesh_terms: D001288:Attention; D002648:Child; D002657:Child Development; D003071:Cognition; D003463:Cues; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D007360:Intelligence; D011581:Psychological Tests; D011582:Psychological Theory; D012054:Reinforcement, Psychology; D012923:Social Class