测验等值无疑是测量中一个重要问题。《面向心理学家的项目反应理论》一书指出,“项目反应理论(IRT)最初吸引美国测验编制人员。是因为这种理论可以解决许多测验中的实际问题,比如将不同形式的测验形式等值。”《BILOG.3使用说明书》指出,“IRT与经典测验理论(CTT)相比,或许最大的长处是测验等值”。事实上,在IRT框架下实施等值,不仅理论完善,前提条件较容易满足,而且等值关系式也十分简洁。 Quiz is undoubtedly an important issue in the measurement. The Project Response Theory for Psychologists states that “Project Response Theory (IRT) initially attracted the staff of the U.S. test preparation because it could solve practical problems in many tests, such as the different forms of test forms Value. ”“ BILOG.3 Instruction Manual ”states that“ the greatest strength of IRT as compared to the classical test theory (CTT) is the quiz value. ” In fact, the implementation of equivalence under the framework of IRT not only improves the theory, the preconditions are easier to satisfy, but the equivalence relation is also very simple.