Watson, John B. (Broadus) (1878-1958), a United States psychologist. In Behavior (1914) and other books, Watson argued that psychologists, to be scientific, must study what people do, not what they say they think or feel. His theory, called behaviorism, strongly influenced experimental methods in psychology. Watson was born in Greenville, South Carolina. He received a Ph.D. at the University of Chicago in 1903. From 1908 to 1920 he taught at Johns Hopkins University, then entered the advertising business.
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