James McKeen Cattell (May 25, 1860 - January 20, 1944), American psychologist, is the first professor of psychology in the United States at the University of Pennsylvania and longtime editor and publisher of scientific journals and publications, most notably the journal Science.
He also serves on the board of trustees for Science Service, now known as Society for Science & the Public (or SSP), from 1921-1944.
At the beginning of his career, many scientists regard psychology at best a minor field of study, or at worst a pseudoscience such as phrenology.
Perhaps more than any of his contemporaries, Cattell helps establish psychology as a legitimate science, worthy of study at the highest levels of the academy.
At the time of his death, The New York Times hails him as "the dean of American science."