基于IRT的一种计算机化自适应测验的选题方法  

A Method of Item Selecting in the Computerized Adaptive Testing Based on IRT

作　　者：程黄金[1] 王永国[2] 

机构地区：[1]淮南联合大学基础部,安徽淮南232038 [2]安徽大学数学科学学院,合肥230039

出　　处：《合肥学院学报（自然科学版）》2008年第4期26-28,共3页Journal of Hefei University :Natural Sciences

摘　　要：传统的纸笔测验无法有效地满足全部被试的能力估计的要求,计算机化自适应测验(CAT)能够不断根据被试的作答来估计其能力,并抽取与此能力相适应的项目来,选题是CAT的关键.先介绍了CAT的概念和原理,然后借助项目信息函数重点研究了一种CAT的选题方法.Traditional Paper and Pencil Test can not effectively meet the requirement for estimating all the examinees＇ abilities, but Computerized Adaptive Test can continuously estimate their abilities according to examinees＇ responses, and select the item adapting to their abilities; selecting item is the key to CAT. The paper first introduces the concept and principles of CAT, then focuses on studying a method of selecting item and using item information function of CAT.

关 键 词：项目反应理论 计算机化自适应测验 项目信息函数 

分 类 号：TP391.76[自动化与计算机技术—计算机应用技术]