【摘要】 在对测量结果进行分析和评价时，人们常常要利用各种指数来对测量的难度、辨别力和可靠性等作出定量科学的分析。但这些指数的计算方法不止一种，实践证明用不同方法计算的指数将有所不同。本文从理论上对这些方法的理论公式作了详细的数学推导，比较了它们存在的共性和区别以及应用的局限性。为使一些方法具有更大的适用范围，对某些公式作了必要的修正。为我们在实际应用中采用合适的正确的方法提供了理论指导。更多还原

【Abstract】 When analyzing and evaluating the measurments’ results,some indexes are often used to analyze the difficulties,the differentiation and the reliability of the measurement in quantity.But there are not only one method for an index,different results will be gained with different method.The theoretic formula of these method are deduced implicitly,and their commons,distinguishments and limitations are compared.some fomula are necessarily corrected in order to expand their application area.更多还原