b f Skinner

B.F. Skinner died in August 1990. He had been praised as one of the most influential psychologists of the 20th century, but was also attacked by a variety of opponents within and outside the field of psychology.

B. F. Skinner titled this book, Contingencies of Reinforcement, after the heart of his science of behavior. Contingencies relate classes of actions to postcedent events and to the contexts in which those action-postcedent relations occur.