Results: All the results were in accordance with the request of unidimensionality, the data fitted Three-Parameter Logistic Model, and finally 52 items were selected to constitute the formal test.

• 结果：四套试卷均符合单维性要求，基本拟合三参数逻辑斯蒂克模型，项目拟合度都在90%25左右，最终选取52个项目组成正式测验。