Problem: Who is being described in the following biography? He was trained by Wundt in psychology. However, he did not like German psychology. Upon his return to the Unites States, he became interested in the development of mental tests to measure individual differences. He had a very productive career. At twenty-eight, he was professor at the University of Pennsylvania; at thirty-one, he was chair of the psychology department at Columbia University; at thirty-five, he was president of the American Psychological Association; and, at forty, he was the first psychologist elected to the National Academy of Sciences. Throughout his long but stormy career, he maintained that psychology should be known by the public. a. James McKeen Cattell b. William James c. G. Stanley Hall d. John Dewey