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Donald T. Campbell

Donald Thomas Campbell (November 20, 1916 – May 6, 1996) was an American social scientist. He is noted for his work in methodology. He coined the term ''evolutionary epistemology'' and developed a selectionist theory of human creativity. A ''Review of General Psychology'' survey, published in 2002, ranked Campbell as the 33rd most cited psychologist of the 20th century. Provided by Wikipedia