John B. Watson
Harvey A. Carr (April 30, 1873 – June 21, 1954), a founding father of functionalist psychology, was renowned for a methodical and thorough approach to his science. His work was largely devoted to studies of animal cognition and perception. Carr collaborated with John B. Watson on his most well-known project: the famous Kerplunk experiment. Carr held his post as chairman of the Psychology department at the University of Chicago from 1926 to 1938. He also served as the president of the American Psychological Association in 1926.