常模参照测验中项目难度分析的算法设计  

The Algorithm Design of Item Difficulty Analysis in Norm-referenced Test

作　　者：徐继红[1] 

机构地区：[1]内蒙古师范大学传媒学院,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2010年第2期152-155,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：内蒙古自治区高等教育科学研究"十一五"规划课题(NGZG06023)

摘　　要：利用通过率定义的项目难度不具有可加性,因而无法估算试卷的整体难度.对于常模参照测验,可以通过计算正态分布下能力水平轴上的z值来估算项目难度.采用弦截法设计了算法流程,用VB6.0编程对项目难度进行估算,并通过数据分析证实了算法的有效性.The definition of the items＇ difficulty by the pass rate can not estimate the overall difficulty of examination papers,because the pass rate is not cumulative.With regard to norm-referenced tests,the difficulty of the items and papers can be estimated through calculating the ability of the z axis value.In this thesis,the algorithm flow is designed with chord cut-off method,the items＇ difficulty is estimated with VB6.0 program,and the algorithm is verified valid by the data analysis.

关 键 词：常模参照测验 项目 试卷 难度分析 算法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]