title: Response to differential visual complexity in four groups of retarded children.
mesh_terms: D000223:Adaptation, Psychological; D000293:Adolescent; D000328:Adult; D000818:Animals; D001519:Behavior; D001925:Brain Damage, Chronic; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome; D004660:Encephalitis; D006801:Humans; D008607:Intellectual Disability; D011581:Psychological Tests