Abstract
After conditioning in a Skinner box where food reinforcement was associated with light and delivery mechanism click, pigmented rats were given extinction trials, one group with light-click stimulation during extinction, the other group without. Conditions were alternated between these conditions for 7 extinction sessions at 24-hour intervals. The results showed successive spontaneous recovery that could be attributed to the secondary reinforcements, the proportional effectiveness of the light-click stimulation remaining relatively constant throughout the series of spontaneous recoveries.
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