Persons important in the history of psychology without an advanced degree in psychology
  1. Erik Erikson
    Most known for his psychosocial theory of development, especially the identity crisis of adolescence. He did not even earn a bachelor's degree.
  2. Henry Murray
    Best known for the projective personality test, the Thematic Apperception Test. He earned his doctorate in biochemistry.
  3. Herbert Simon
    Important figure in the development of cognitive psychology and Nobel Prize winner. His PhD was in political science.
  4. Jean Piaget
    Well known for his four-stage theory of cognitive development. His PhD was in natural sciences.
  5. Noam Chomsky
    Important figure in the psychology of language. He earned his doctorate in linguistics.