title: Smythies' use of the 'Sidman schedule' as an animal test for hallucinogenic drug effects.
mesh_terms: D000818:Animals; D001362:Avoidance Learning; D001522:Behavior, Animal; D003624:Darkness; D006213:Hallucinogens / Q000494:pharmacology*; D051381:Rats
chemical_list: D006213:Hallucinogens