Abstract
The criticized experimenters sought to find whether rats can learn a maze-route to a goal-material by runs to that material while not motivated for it. Their results are inconclusive. The conditions of the tests caused the rats to respond very tardily, if at all, to the goal-material. In the expt. by Leeper which prompted these studies, however, the use of conditions which insured immediate response did demonstrate such learning without reinforcement.

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