| IRT中测验信息函数性质的解析及估值方法 |
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| 引用本文： | 田振清.IRT中测验信息函数性质的解析及估值方法[J].内蒙古师范大学学报(自然科学版),2009,38(6):671-673. |
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| 作者姓名： | 田振清 |
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| 作者单位： | 内蒙古师范大学传媒学院; |
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| 基金项目： | 内蒙古自治区高等教育科学研究“十一五”规划课题(NGZG06023) |
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| 摘 要： | 介绍了项目反应理论(IRT)的三参数Logistic数学模型,给出测验信息函数和项目信息函数的数学表达式.通过分析项目信息函数的主要特性,设计了绘制被试的特质水平(θ)~测验信息函数(I(θ))曲线的算法,给出I(θ)值的估算方法.
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| 关 键 词： | 项目反应理论 特质水平 测验信息函数 算法设计 数值估算 |
Analysis and Numerical Estimation of the Test Information Function in Item Response Theory |
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| TIAN Zhen-qing.Analysis and Numerical Estimation of the Test Information Function in Item Response Theory[J].Journal of Inner Mongolia Normal University(Natural Science Edition),2009,38(6):671-673. |
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| Authors: | TIAN Zhen-qing |
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| Institution: | College of Media;Inner Mongolia Normal University;Hohhot 010022;China |
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| Abstract: | The three-parameter Logistic mathematical model in Item Response Theory was introduced,and the mathematical expressions of the test information function and item information function were given.By analyzing the main features of the item information function,the algorithm for drawing the curve of the subject's trait level vs.test information function was designed,and the numerical estimates method for the test information function was given. |
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| Keywords: | Item Response Theory trait level test information function algorithm design numerical estimates |
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