摘要
通过对正态分布函数及试题难度表示的深入分析,质疑了两类常用的难度分布算法的正确性。结合难度在IRT理论的定义,导出一种符合正态分布函数基本原理的试题难度分布算法。比较的结果表明,本算法更先进。
Some algorithms for difficulty distribution may have some suspicions, the paper points out the key that it is the correct expression on interval sealing for difficulty. A novel method is put forward to calculate the difficulty distribution according to the ditli- culty definition in IRT. Simulation shows the effectualness in application.
出处
《计算机与现代化》
2009年第11期33-35,共3页
Computer and Modernization
关键词
试题难度分布
IRT
等距量表
正态分布函数
difficulty distribution
IRT
interval scaling
normal distribution function
