Abstract
Rats learned a brightness discrimination with irrelevant form cues present. Following overtraining, reinforcement contingencies were successively reversed with respect to brightness cues. Novel form cues were introduced at the first reversal and at each of two successive reversals for 20 rats; 20 experienced the same form cues throughout. The novel-cue group required significantly fewer trials to criterion than the same-cue group, over all phases. Implications of the facilitative effect of novelty along an irrelevant dimension are discussed.
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