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Korean J Med Educ > Volume 19(2); 2007 > Article
Korean Journal of Medical Education 2007;19(2): 163-169. doi: https://doi.org/10.3946/kjme.2007.19.2.163
문항반응이론을 의사국가시험에 적용하기 위한 일차원성 및 적합도 검정
임미경1,3, 허선2,3
2한림대학교 의과대학 기생충학교실
3한림대학교 의과대학 의학교육연구소
Testing Unidimensionality and Goodness-of-fitness for the Application of Item Response Theory to the Korean Medical Licensing Examination
Mi Kyoung Yim1,3, Sun Huh2,3
1National Health Personnel Licensing Examination Board, Seoul, Korea.
2Department of Parasitology, College of Medicine, Hallym University, Chuncheon, Korea.
3Institute of Medical Education, Hallym University, Chuncheon, Korea.
Corresponding Author: Sun Huh, Tel: 033)248-2652, Fax: 033)241-1672, Email: shuh@hallym.ac.kr
PURPOSE: In order to apply the item response theory to test results, the assumptions made about unidimensionality and item goodness-of-fitness should be tested before analysis. To know if the Korean Medical Licensing Examination results fulfill these assumptions, appropriate tests were done on these two features. METHODS: Three results(from three subjects) of the Korean Medical Licensing Examination, done in January 2004, were converted into 1, 0 data. The Holland and Rosenbaum Method(HRMH) and DETECT were used to test unidimensionality. The Winsteps was used to test goodness-of-fitness according to the Rasch model. RESULTS: Unidimensionality was rejected by HRMH but accepted by DETECT. With the Rasch model, 2 out of 550 items were inadequate. Each 137, 73 and 455 examinees out of 3,881 were inadequate in three subjects of 126, 400 and 24 items. CONCLUSION: The above results suggest that DETECT is desirable for testing unidimensionality of high-stakes tests with more than 100 items. According to the Rasch model, the Korean Medical Licensing Examination fulfills the goodness-of-fitness to be analyzed according to the item response theory.
Keywords: Item response theory;Unidimensionality;Goodness-of-fitness;Korean Medical Licensing Examination
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