Dinsmoor, J. A. (1950). A quantitative comparison of the discriminative and reinforcing functions of a stimulus. Journal of Experimental Psychology, 40, 458-471.

Dinsmoor, J. A. (1952). The retention of a discrimination. Science, 115, 18-19.

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Herrick, R. M., Myers, J. L.,& Korotkin, A. L. (1959). Changes in SD and S rates during the development of an operant discrimination. Journal of Comparative and Physiological Psychology, 52, 359-363.

Keller, F. S., & Schoenfeld, W. N. (1950). Principles of Psychology. New York: Appleton-Century-Crofts, Inc.

Smith, M. H., Jr., & Hoy, W. H. (1954). Rate of response during operant discrimination. Journal of Experimental Psychology, 48, 259-264.

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