Abstract
Predictions of the Burke-Estes probabilistic discrimination model were verified in a situation in which reinforcement probabilities varied from.90 to.10 on alternate trials. Fifty college student Ss were able to discriminate between the stimulus traces of reinforcing events of preceding trials in a two-choice light guessing situation. The.90-.10 probabilistic alternation pattern was about three times more difficult to learn than a “pure” 1.00-.00 alternation pattern, based on estimates of the discrimination parameter from the data.
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