项目特性曲线模型参数的估计

Estimation of Item-Characteristic-Curve-Model Parameter

将两参数逻辑斯蒂模型作为多级评分模型,并用迭代法对项目参数及能力参数进行点估计.

The two-parameter logistic model is regarded as a polychotomous test model,and the item parameter and the ability parameter are further estimated with the iteration method.