基于IRT的试题分析:R软件ltm包运用实例

Item Analysis Based on Item Response Theory:An Example from ltm Package of R Software

现代考试中,基于IRT的试题分析已经成为一项日益重要的应用内容。本文简要介绍了R软件的ltm包可以处理的四个重要IRT模型,并运用心理咨询师职业资格考试试题数据,分别对0-1型计分试题和多级计分试题进行了试题拟合分析。同时,结合R软件具有的特性,对应用ltm包分析试题的结果进行了探讨。

In modem examination, item analysis based on IRT model has gradually been an important application. In this paper, an overview of the hm package of R software was introduced, and multivariate dichotomous and polytomous data from psychological counselors＇ certification examination was used to fit the four important IRT model by hm package. Combine the characteristics of the R software, we discussed the results of item analysis on the application of hm package.