Bruner, J. S., Goodnow, Jacqueline J., and Austin, G. A.A Study of Thinking. New York: John Wiley & Sons, 1956.
2.
Bush, R. R. and Mosteller, F.Stochastic Models for Learning. New York: John Wiley & Sons, 1955 .
3.
Goodnow, Jacqueline J. " Determinants of Choice-Distribution in Two-Choice Situations." American Journal of Psychology, LXVIII (1955), 106-116.
4.
Hull, C. L. "Quantitative Aspect of the Evolution of Concepts." Psychological Monographs , XXVIII (1920), No. I (Whole Number I23).
5.
Jarvik, M. E. "Probability Learning and a Negative Recency Effect in the Serial Anticipation of Alternative Symbols." Journal of Experimental Psychology, XLI (1955), 291-297.
6.
Viancke, W. E. "The Investigation of Concept Formation." Psychological Bulletin, XLVIII (1951), 1-31.