impressed with psychoanalysis, which influenced his book The Freudian Wish. His most famous work was published in 1931, Animal Drive and the Learning Process: An Essay Toward Radical Empiricism, which presented his views on learning and development.

Holt's psychology was related to the behaviorism of Watson, but his views about behavior were broader and more philosophically oriented than Watson's, including for instance notions such as goals, purposes, and plans, clearly observable in the actions