子题库题量不平衡的按a分层选题策略

A-Stratified Item Selection Criteria on Unbalanced Quantities of the Items in Sub-Item Pools

讨论了子题库中题量的配置是否是最优的问题,分别将子题库划分成项目数相等和不相等的情况进行比较.通过计算机模拟实验显示,当各子题库的项目数量逐层减少时,测验效率与项目曝光率指标都较理想.

The optimization question on the quantity of the items in the sub-item pool is discussed.The computer simula-tion shows both the test efficiency and item exposure rate are relatively ideal while the number of items in the sub-item bank is reduced layer by layer.