B.F. Skinner becomes a member of Psi Chi, the national honor society in psychology. Skinner is the founder of a school of experimental research psychology named "experimental analysis of behavior" as well as a philosophy of science which he calls "radical behaviorism."
According to Skinner's theory of behaviorism, human behavior can best be explained as responses to specific external stimuli. Many think behaviorism means that a response is best maintained with the constant repetition of external stimuli, but in fact just the opposite is the case.
Studies demonstrate that when it comes to gambling, for example, a Variable Ratio Schedule will keep people playing. Thus, to become addictive a game must pay off after 10 tries, then 3 tries, then 13 tries, etc. Even extremely infrequent payoffs not only keep people gambling, but also animals like rats or pigeons pecking at a lever to get at food.