The codes printed on your driving licence tell you what conditions you must meet to drive.he codes printed on your driving licence tell you what conditions you must meet to drive.
Ivan Pavlov was a Russian physiologist whose research on the physiology of digestion led to the development of the first experimental model of learning, Classical Conditioning. Most of his research was gathered studying salivating dogs.
What might surprise you is that this theory, based on so little, has actually had an influence on several modern theorists. Adler, for example, related these types to his four personalities. But, more to the point, Ivan Pavlov, of classical conditioning fame, used the humors to describe his dogsâ personalities.