title: Effect of schedule of reinforcement and stomach loads on bar pressing by thirsty rats.
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D003216:Conditioning, Operant; D003213:Conditioning, Psychological; D008297:Male; D051381:Rats; D012055:Reinforcement Schedule; D012054:Reinforcement, Psychology; D012965:Sodium Chloride; D013894:Thirst; D014867:Water
chemical_list: D014867:Water; D012965:Sodium Chloride