Ivan Petrovitch Pavlov, (1849-1936) conditioned reflexes.
D003214:Conditioning, Classical; D049672:History, 19th Century; D049673:History, 20th Century; D010827:Physiology / Q000266:history; D011589:Psychology, Experimental / Q000266:history; D012426:Russia; D012425:Russia (Pre-1917)