Ivan Pavlov

Ivan Pavlov was a Russian physiologist best known for his work in classical conditioning, a fundamental theory in behavioral psychology. He was born on September 26, 1849, and died on February 27, 1936. Pavlov originally studied to be a priest but shifted his focus to the study of natural sciences and eventually earned a Nobel Prize in Physiology in 1904 for his research on the physiology of the digestive system.