Final answer:
John Dewey, Charles Sanders Peirce, Sigmund Freud, and Margaret Floy Washburn were early American psychologists who were students of William James.
Step-by-step explanation:
- John Dewey: Dewey helped establish functional psychology and was influenced by Darwin's theory of evolution. His contribution was in viewing psychology as the study of how behavior functions in the world.
- Charles Sanders Peirce: Like Dewey, Peirce accepted Darwin's theory and believed that natural selection led to adaptive behavior. He contributed to functionalism by emphasizing the function of behavior in relation to an organism's environment.
- Sigmund Freud: Freud was an influential figure in psychology and his psychoanalytic theory focused on the role of the unconscious mind and early childhood experiences.
- Margaret Floy Washburn: Washburn was the first woman to earn a PhD in psychology and her research focused on animal behavior and cognition.