James M. Cattell
1860 - 1944
James McKeen Cattell, (born May 25, 1860, Easton, Pa., U.S.—died Jan. 20, 1944, Lancaster, Pa.), U.S. psychologist who oriented U.S. psychology toward use of objective experimental methods, mental testing, and application of psychology to the fields of education, business, industry, and advertising. He originated two professional directories and published five scientific periodicals.