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.
Psychologist Edwin Twitmyer at the University of Pennsylvania in the U.S. discovered classical conditioning at approximately the same time as Pavlov was conducting his research . 1 However, the two were unaware of each other's research in this case of simultaneous discovery, and Pavlov received credit for the findings.