A microanalysis of drug effects on fixed-ratio performance in pigeons.
D000661:Amphetamine / Q000008:administration & dosage / Q000494:pharmacology; D000818:Animals; D010856:Columbidae; D003216:Conditioning, Operant / Q000187:drug effects*; D007099:Imipramine / Q000008:administration & dosage / Q000494:pharmacology; D008297:Male; D010424:Pentobarbital / Q000008:administration & dosage / Q000494:pharmacology; D012055:Reinforcement Schedule; D013997:Time Factors
D000661:Amphetamine; D010424:Pentobarbital; D007099:Imipramine