应用项目反应理论对《中国士兵人格问卷》的项目分析

Item Analysis of the Chinese Soldier Personality Questionnaire Using Item Response Theory

采用项目反应理论（IRT）对《中国士兵人格问卷》进行项目分析。计算机呈现中国士兵人格问卷（CSPQ）对100，523名适龄男性青年进行测验，随机抽取2676名任一维度标准分均低于70的定为合格组；将任一维度大于70分并经专业人员访谈不合格的274名定为不合格组；从精神病院抽取男性年龄相当的 221名缓解期精神分裂症患者定为精神病组，并完成CSPQ测验。运用基于IRT的双参数Logistic模型进行分析；结果发现，区分度参数超过区间 (0.30，4.00)的条目删除前后，被试的能力值与标准分均存在显著相关；精神病组的测验分数经IRT分析，图形曲线与不合格组有高度吻合。研究结果说明，在测验精度基本相同的条件下，应用IRT可以减少施测条目，提高测验效率，可在一定程度上更精确地区分被试的特质水平。

With the development of psychological and educational measurement， item response theory (IRT) is being increasingly used in psychological and educational testing areas. There have been many large-scale tests based on IRT， such as TOEFL and GRE. Further， there have also been many studies on the applications of IRT in personality questionnaires. However， many problems still remain， including model selection and determining the appropriate numbers of parameters. It is vital to conduct empirical stu