Stimulus generalization following different methods of training.

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Abstract
Three groups of eight rats each were trained to traverse a runway. The training procedure involved differential reinforcement of the running response to presence or absence of hardware cloth (Group D), 100% reinforcement of the response to the positive stimulus (C), or intermittent reinforcement (INT). All groups received identical non-reinforced test trials to the positive training stimulus and to a novel stimulus differing in color. A significant generalization decrement was obtained for all groups; i.e., response strength was less to the novel stimulus than to the positive training stimulus. The generalization decrement was significantly (p <.001) greater for Group D than Group C. The decrement for Group D was also greater than for Group INT, but this difference was only of borderline significance. It was concluded that differential conditioning along one dimension increases the slope of the generalization gradient along a second dimension.
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