(1860-1944) a U.S. psychologist who became the first American ever to publish a psychology dissertation and earn a German doctorate. By age 28, he was also the first psychology professor ever to be appointed, this time, in the University of Pennsylvania. Cattell devised the first battery of tests for the psychological assessment of special ability. He is best-known for his notable contributions to the study of intelligence and perception through experimental methods.

CATTELL, JAMES MCKEEN: "Intent on helping establish psychology as another legitimate science, James McKeen Cattell co-founded the Psychological Corporation and edited journals such as Popular Science Monthly and The American Naturalist. "
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