Edgar Dale's Cone of Experience

Edgar Dale (April 27, 1900 in Benson, Minnesota, – March 8, 1985 in Columbus, Ohio) was an American educationist who developed the Cone of Experience. He made several contributions to audio and visual instruction, including a methodology for analyzing the content of motion pictures. Born and raised in North Dakota he received a B.A. and M.A. from the University of North Dakota and a Ph.D from the University of Chicago.^[1] His doctoral thesis was titled "Factual Basis for Curriculum Revision in Arithmetic with Special Reference to Children's Understanding of Business Terms" and is precursor for his later work with vocabulary and readability. He was a professor of education at Ohio State University.

Source: http://www.sparkinsight.com/factlets