It shows that information function can more accurately evaluate the quality of items and test and the ability of examinees than CTT does, so it has more strong guidance in editing test.

• 研究结论表明：信息函数较经典测量理论能更精确地评价项目质量、测验质量及被试能力水平，因而对测验及学生能力水平的评价更科学，同时对测验的编制有更强的指导作用，值得推广。