Knight Dunlap was born on 21 November 1875 in Diamond Spring, California. He studied psychology at the University of California at Berkeley with George M. Stratton, receiving his PhB in 1899 and LM in 1900. Dunlap then studied with Hugo MÜnsterberg at Harvard University, obtaining the MA in 1901 and PhD in psychology in 1903. From 1904 to 1906 Dunlap was an instructor of psychology. In 1906 he followed Stratton to the psychology department at Johns Hopkins University, and remained there for thirty years as professor of experimental psychology, serving as department chair for much of that time. His more famous colleague at Johns Hopkins was John B. Watson. In 1936 Dunlap became a professor of psychology at the University of California at Los Angeles, from which he retired in 1946. Dunlap was President of the Southern Society for Philosophy and Psychology in 1920, and the American Psychological Association in 1929. He died on 14 August 1949 in Columbia, South Carolina.
From The Dictionary of Modern American Philosophers in Oxford Reference.