This research, which proposed taking in a concept of inconsistency rate in dependence relation of the Ordering theory, clarified sequence of understanding learners by measuring understanding state of Java programming language. Inconsistency rate signified probability that combinations of two answers based on certain condition were included in a set In the set, inconsistency that mistaken answer was given to the easy test item and correct answer was given to the difficult test item, accrued in dependence relation of the Ordering theory.
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