Abstract
Six rats were conditioned to press a bar for food reinforcement. During each session, there were six presentations of a 2-min light CS followed by a tone. The tone lasted until 2 sec had passed without a barpress. Then a sucrose-solution UCS was presented. When the ratio of response rate during the CS to response rate prior to the CS was calculated, it was found that the ratio was lowest when barpressing was reinforced on a VI 90-sec schedule, was at an intermediate value when barpressing was reinforced on a VI 4-min schedule, and was highest when barpressing was not reinforced.
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Meltzer, D., Hamm, R.J. Conditioned enhancement as a function of schedule of reinforcement. Bull. Psychon. Soc. 3, 99–101 (1974). https://doi.org/10.3758/BF03333406
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DOI: https://doi.org/10.3758/BF03333406