title: Ambiguous-cue problem performance of children, retardates, and monkeys.
mesh_terms: D000818:Animals; D002648:Child; D003463:Cues; D004193:Discrimination Learning; D005260:Female; D000882:Haplorhini; D006801:Humans; D008607:Intellectual Disability; D008297:Male; D012055:Reinforcement Schedule