Who was the first woman to earn a Ph.D. in psychology?

Who was the first woman to earn a Ph.D. in psychology?

1. Helen Thompson Woolley

2. Mary Whiton Calkins

3. Leta Stetter Hollingworth

4. Margaret Floy Washburn

Correct Option: Option D,

Margaret Floy Washburn

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 Margaret Floy Washburn became the first woman to earn her doctoral degree in American Psychology, and subsequently became one of the most influential psychologists of her time. She was introduced to the new field of psychology. When she graduated college in 1891, Washburn wanted to study with James McKeen Cattell in his psychological laboratory, located at Columbia University.