title: Differential conditioning and contrast effects in rats.
mesh_terms: D000818:Animals; D003216:Conditioning, Operant; D003657:Decision Making; D004193:Discrimination Learning; D008029:Lighting; D008124:Locomotion; D008297:Male; D011336:Probability; D051381:Rats; D012055:Reinforcement Schedule; D012201:Reward; D014796:Visual Perception