title: Enforced observation in delayed response learning by frontal monkeys.
mesh_terms: D000818:Animals; D003463:Cues; D004193:Discrimination Learning; D005260:Female; D005625:Frontal Lobe / Q000502:physiology*; D000882:Haplorhini; D007858:Learning; D012054:Reinforcement, Psychology; D012201:Reward