title: Shifts in magnitude of reward and contrast effects in instrumental and selective learning: a reinterpretation.
mesh_terms: D000818:Animals; D001070:Appetitive Behavior; D001143:Arousal; D001244:Association; D003216:Conditioning, Operant; D004193:Discrimination Learning; D008722:Methods; D008960:Models, Psychological; D051381:Rats; D012055:Reinforcement Schedule; D012054:Reinforcement, Psychology; D012201:Reward; D013997:Time Factors