title: Positive behavioral contrast negative simultaneous contrast and their relation to frustration in pigeons.
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D010856:Columbidae; D003216:Conditioning, Operant; D004193:Discrimination Learning; D005247:Feeding Behavior; D005639:Frustration; D008297:Male; D010775:Photic Stimulation; D012055:Reinforcement Schedule; D012054:Reinforcement, Psychology; D012201:Reward; D014796:Visual Perception