Deriving Polytomous Scoring Models Based on Item Node
基于项目节点的多级评分模型的统一

Nowadays, polytomous items are widely used in psychological and educational tests. Polytomous items are more attractive than dichotomous items because they can provide more information for the examinees. With respect to polytomous items, there are many models to use such as the Grade Response Model (GRM), which was proposed by Samejima (1969), the Nominal Categories Model (NCM), which was proposed by Bock (1972), and the Partial Credit Model (PCM), which was proposed by Masters (1982). It is known that the ...