Abstract
Nine groups of albino rats were extinguished in a runway after receiving various sequences of delayed and immediate reinforcement. Reward consisted of variations in quality (alfalfa or sucrose pellets) and combinations of quality and quantity (4, 10, or 16 pellets) presented either immediately or following a 30-sec. delay. The results indicated that high quality immediate reward increased resistance to extinction, whereas low quality immediate reward decreased resistance to extinction. Additionally, low quality or small quantity delayed reward and combinations of high quality/large quantity immediate reward increased resistance to extinction. The findings provide further evidence for an extension of Capaldi’s sequential theory to include quality of reward.
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