title: DIFFERENCE LIMEN FOR PERCEPTION OF THE VERTICAL IN MONKEYS.
mesh_terms: D000818:Animals; D004056:Differential Threshold; D004193:Discrimination Learning; D000882:Haplorhini; D010465:Perception; D012106:Research; D013028:Space Perception
keywords: DISCRIMINATION LEARNING; EXPERIMENTAL LAB STUDY; MONKEYS; SPACE PERCEPTION