一种提升题库安全性的选题策略

The Item Selection Strategy of Raising Item Pool Security

题库的安全性是实施计算机化自适应测验的关键问题.受原有的动态a分层方法和均值不等式启发,构造了动态a分层的选题策略.模拟实验结果表明:新的选题策略保持了原有动态a分层的测验精度,进一步提高了测验的安全性.

The safety of item pool is the key point to the implementation of computerized adaptive test,inspired by the original dynamic a-stratified method and mean inequality,constructing another item selection strategy of the dynamic a-stratified. The simulation experimental results showed that the new item selection strategy to keep the test precision of the original dynamic a-stratified method,and further improves the security of the test.