Abstract
4 groups of rats were trained to run a straight alley for food reward. During Phase I reward magnitude was 1, or 10 Noyes pellets, and half of the Ss were food deprived. During this phase only the deprived Ss exhibited increasing response speed. During Phase II all Ss were tested under “food satiation” with 10 pellets as reward. Those Ss originally trained while food deprived initially ran faster in Phase II, but with continuing trials their speed declined toward that of nondeprived Ss. These results were interpreted in terms of the theories of Spence and Amsel, which imply that the present procedure should lead to the extinction of incentive motivation in the absence of frustration.
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