Edward Thorndike

Edward L. Thorndike (1874 - 1949) was an American Psychologist who is noted for his theory of Connectionism which implies that learning takes place as the result of a connection between a stimulus (S) and a response (R). Thorndike is also well known for his "Law of Effect", which states that when a connection between S-R is positively rewarded it will be strengthened, and when it is negatively rewarded it will be weakened.

The following video shows the work of Thorndike observing cats in a puzzle-box.