title: Development of interpersonal language responses in two moderately retarded children.
mesh_terms: D000293:Adolescent; D002648:Child; D003216:Conditioning, Operant; D004495:Education of Persons with Intellectual Disabilities; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D007802:Language; D008297:Male; D010988:Play and Playthings; D012054:Reinforcement, Psychology; D012919:Social Behavior