As both Thorndike and Pavlov discovered early, the effects of training are not entirely specific to the training conditions, but generalize to other conditions. For example, a pigeon reinforced for pecking a red key may as a result of the training show a strong tendency to peck a yellow key which it never has encountered before even though it is perfectly capable of distinguishing the two colors. Generalization, which is not an all-or-none phenomenon, does vary with the distinguishability of the training and testing situations, but distinguishability is not the only determinant of generalization, nor the most interesting one. Our principal concern in these experiments is to try to understand why it is that the amount of generalization may vary widely even when distinguishability remains constant.
KeywordsAssociative Strength Generalization Gradient Relative Control Discriminative Training Relative Gradient
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