Burrhus Frederic Skinner (Psychology/1904-1990), was an American psychologist notable for his work on behavior, free will, and conditioning. Skinner is credited with inventing the concept of operant conditioning, a theory that states that people (or animals) will repeat behaviors for rewards or cease behaviors to avoid punishment. He confirmed these theories using his Skinner Box, which allowed rats to press a button in order to receive food. Before his death in 1990, Skinner was a professor at Harvard University, publishing 180 articles and twenty-one books during his career.
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