The methods applied in data analysis are the analysis of item characteristic curve, item information function, test information function and item validity, as well as the checking of biased items. 质量评估的主要方法是对项目特征曲线(ICC)、项目信息函数、测验信息函数、项目预测效度的分析和对项目偏差的检测。
It needs Test Equating to establish a Item Bank of Polytomous Scored Model under the IRT. This study deduced the Item Characteristic Curve(ICC) Method for the purpose under the Graded Response Model and got success on the equating experiment. 主、客观题并用的测验建项目反应理论题库需作多级模型项目参数等值,本研究推演了等级反应模型下项目特征曲线(ICC)等值方法并在实际等值试验中获得成功。