The theory of learning, intelligence, and memory.
Barcroft, Joseph, The Brain and Its Environment, New Haven: Yale University Press, 1948, 117 pp.
Beach, Frank A., Payday for Primates, Natural History, vol. 56, no. 10, Dec. 1947, pp. 448-451.
Beach, Frank A., Can Animals Reason? Natural History, vol. 57, no. 3, Mar. 1948, pp. 112-116 ...
Berry, R. J. A., Brain and Mind, or the Nervous System of Man, New York: The Macmillan Co., 1928, 608 pp.
Boring, Edwin G., A History of Experimental Psychology, New York: Century Co., 1929, 699 pp.
Franz, Shepherd I., The Evolution of an Idea; How the Brain Works, Los Angeles: University of California, 1929, 35 pp.
Herrick, C. Judson, The Thinking Machine, Chicago: University of Chicago Press, 1929, 374 pp.
Herrick, C. Judson, Brains of Rats and Men, Chicago: University of Chicago Press, 1930, 382 pp.