Abstract
Matrix-method is being advocated as a strategy for promoting the application of the equivalent rule proposition(p≡q). This method intends to improve the reliance on the presented rule through reducing the validity of the anti-rule proposition(p・not-q and not-p・q). However, previous studies have indicated that its effect is reduced in cases where the learners posit "pseudo-exceptions", i.e. instances erroneously treated as exceptions. The purpose of this study was to investigate how to cope with this problem. The results of two experiments made clear that replacing the "pseudo-exceptions" with positive instances by Matrix-method was effective to promote application of rules. And it was suggested that this procedure made leaners reconsider "pseudo-exceptions" as positive instances and maintained the effect of Matrix-method even if the "pseudo-exceptions" came to mind.
