兼顾能力与知识状态的Higher-Order CD-CAT选题方法

Higher-order CD-CAT的选题方法是传统单目标(即只对知识状态自适应)选题方法,这将导致被试能力的测量精度不高.基于此,在高阶模型和PWKL选题方法的框架下,该文开发了适用于Higher-order CD-CAT的新选题方法,该方法在选题时能同时兼顾能力和知识状态.实验结果表明:与传统选题方法相比,新选题方法的能力和知识状态估计精度都更高,并且在题库安全性上也具有明显的优势.

The Item Selection Method Considering the Ability and Cognitive Profile in Higher-Order CD-CAT

Current item selection methods used in the CAT system select items adaptively according to only the attribute profile,which may lead to low precision with respect to ability.In light of this,under the item selection method of the higher-order CD-CAT and PWKL,the new item selection method that simultaneously considers the ability and attribute profile information is proposed for the higher-order CD-CAT in the paper.The results from the simulation study indicate that the new method proposed in this study always outperforms the existing methods in terms of measurement accuracy of the ability and cognitive profile,and the proposed method has also a significant advantage over the traditional methods in item pool security.