Which psychologist was the first African American to receive a PhD in educational psychology from the University of Chicago in 1925?

According to the APA's "Timeline of Challenge and Progress: The Inclusion of People of Color in Psychology in the United States" (http://www.apa.org/pi/oema/visions/time1.html): 1920 Francis C. Sumner is the first African American awarded the PhD in psychology from a U.S. institution (Clark University); dissertation title: "Psychoanalysis of Freud and Adler." (Guthrie, 1994; Street, 1994).