title: Effects of extensive training on object reversal by frontal monkeys.
mesh_terms: D000818:Animals; D003118:Color Perception; D003216:Conditioning, Operant; D004193:Discrimination Learning; D005625:Frontal Lobe / Q000502:physiology*; D000882:Haplorhini; D008251:Macaca; D011214:Practice, Psychological; D011340:Problem Solving; D012193:Reversal Learning; D012201:Reward