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Advances in Psychological Science    2014, Vol. 22 Issue (5) : 881-888     DOI: 10.3724/SP.J.1042.2014.00881
Research Methods |
The Application of IRT and MIRT in Test Vertical Equating
WANG Yi;TANG Wenqing;LIU Jing;ZHANG Minqiang;LI Ming;LI Guangming
(1 Center for Studies of Psychological Application, School of Psychology, South China Normal University, Guangzhou 510631, China) (2 School of Education, Guangxi University, Nanning 530004, China) (3 Teaching and research section of Foshan education bureau, Foshan, 528000, China)
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Abstract  

Test vertical equating refers to transforming the performance of students in tests of various levels to the same scale. Item Response Theory (IRT) and Multidimensional Item Response Theory (MIRT) are the main methods used in vertical equating. IRT method is an effective way to build a vertical scale because IRT models impose no requirement on the distribution of test-takers’ ability and that item parameters are independent of the samples. However, its application is restricted when the test dose not satisfy the unidimensional assumption. MIRT is a combination of IRT and factor analysis, making it an important tool in vertical equating to estimate ability parameter and item parameter precisely in multidimensional test. Current researches focus on the applicability of IRT and MIRT, calibration method and parameter estimation method in vertical equating and comparison study of the two methods. Future studies should concentrate on including more variables when comparing IRT and MIRT in order to expand their applications.

Keywords item response theory      multidimensional item response theory      vertical equating     
Corresponding Authors: ZHANG Minqiang   
Issue Date: 15 May 2014
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WANG Yi
TANG Wenqing
LIU Jing
ZHANG Minqiang
LI Ming
LI Guangming
Cite this article:   
WANG Yi,TANG Wenqing,LIU Jing, et al. The Application of IRT and MIRT in Test Vertical Equating[J]. Advances in Psychological Science, 2014, 22(5): 881-888.
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http://journal.psych.ac.cn/xlkxjz/EN/10.3724/SP.J.1042.2014.00881     OR     http://journal.psych.ac.cn/xlkxjz/EN/Y2014/V22/I5/881
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