Abstract
In Exp. I, the ORE (overlearning reversal effect) was investigated on a conditional successive brightness discrimination (CD-S) task. The 50-trial-overtrained (50-OT) group and the 150-OT group tended to learn reversal faster than the control group (N-OT). In Exp. II, 64 rats were trained on a simultaneous discrimination (SIM-D) task, and after zero or 100 OT trials, they were shifted to conditional simultaneous discrimination (CS-D). A 2 (brightness SIM-D vs. rough-smooth SIM-D)×2 (same vs. different relevant cue between SIM-D and CS-D) design was adopted. CS-D learning was facilitated by OT only when the relevant cue was the same between SIM-D and CS-D. These results supported 2-stage theory.
