Final answer:
Francis Sumner's source provides insight into his contributions to psychology as the first African American PhD in the field, addressing psychoanalysis, racial bias, and educational justice.
Step-by-step explanation:
From reading Francis Sumner's source, one may learn about his significant contributions to psychology and his historical role as the first African American to receive a PhD in psychology. His work delved into psychoanalysis, racial bias, and educational justice. Sumner's pioneering efforts laid the groundwork for subsequent generations of psychologists and were integral to establishing Howard University's psychology department. Additionally, the reflection on Sumner's source indicates the importance of such secondary sources, which offer compiled research and summarized information that support and enrich academic papers' arguments.
Even though the instruction mentions Charles Sumner and William G. Sumner's works, the student's question seems to concentrate on Francis Sumner's impact on psychology.