试题信息函数对分数等级分类一致性和准确性的影响分析

Analysis of the Influence of Test Information Function on the Consistency and Accuracy of Test Score Classification

在Rasch测量模型框架下,根据Rudner分类方法,对第三批高考综合改革8省份使用的5等级赋分方式进行等级分数分类一致性和准确性研究。研究侧重试题信息函数对分数等级分类一致性和准确性的影响,结果表明:构成测验的试题类型、试题数量、提供的信息量大小、信息函数分布等是影响分类一致性和准确性的重要因素,其中,试题信息函数分布和试题类型对分类一致性和准确性的影响更为显著。

Based on Rasch test theory and Rudner decision-making classification method,this paper studies the consistency and accuracy of the score classification of the five-level and equal-proportional score division methods used in the eight provinces and cities in the third batch of comprehensive reform of the college entrance examination.The results show that the type and quantity of test items,the number of items,the size of information provided by the items and the distribution of information functions are the important factors affecting the consistency and accuracy of classification,while the normality of information function curve and the type of items have more significant influence on the consistency and accuracy of classification.