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Prediction of the Comparative Reinforcement Values of Running and Drinking

David Premack
Science
New Series, Vol. 139, No. 3559 (Mar. 15, 1963), pp. 1062-1063
Stable URL: http://www.jstor.org/stable/1711158
Page Count: 2
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Abstract

The probability of free drinking and running in rats was controlled by sucrose concentration and force requirements on an activity wheel. Drinking and running were then made contingent on pressing a bar. Barpressing increased monotonically with the associated response probability, and equally for drinking and running. The results support the assumption that different responses of equal probability have equal reinforcement value.

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