It is well known that discriminative stimuli can function as conditioned reinforcers. However, most of the empirical support for this conclusion has been derived from experiments with SDs established in appetitive situations rather than in situations in which reinforcement has stemmed from the removal of negatively reinforcing stimuli. In this project the reinforcing efficacy of SDs from the aversive situation is assessed, and the implications of the results for behavioral analysis and further experimentation are discussed.
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