His major theoretical contributions came in his 1932 book, Purposive Behavior in Animals and Men, and in a series of papers in the Psychological Review, "The determinants of behavior at a choice point" (1938), "Cognitive maps in rats and men" (1948), and "Principles of performance" (1955).
Hans stora teoretiska bidrag kom i hans bok, Purposive Behavior in Animals and Men, 1932, och i en rad uppsatser i Psychological Review, The determinants of behavior at a choice point (1938), Cognitive maps in rats and men (1948) och Principles of performance (1955).