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Open AccessArticle

The MIR 2018 Exam: Psychometric Study and Comparison with the Previous Nine Years

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Curso Intensivo MIR Asturias, c/ Quintana 11A, 33005 Oviedo, Spain
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Mathematics Department, Faculty of Sciences, University of Oviedo, c/ Federico García Lorca 18, 33007 Oviedo, Spain
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Blog GangasMIR, c/ Coso 126, 50002 Zaragoza, Spain
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Villacampa Ophthalmic Clinic, c/ La Cámara 15, 33401 Avilés, Spain
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Internal Medicine Department, Hospital Universitario La Princesa, 28006 Madrid, Spain
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Medical Oncology Department, Hospital Universitario Central de Asturias, 33011 Oviedo, Spain
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Cardiology Department, Hospital San Agustín, 33401 Avilés, Spain
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Author to whom correspondence should be addressed.
Medicina 2019, 55(12), 751; https://doi.org/10.3390/medicina55120751
Received: 21 August 2019 / Revised: 4 November 2019 / Accepted: 18 November 2019 / Published: 20 November 2019
Background and Objectives: The aim of the present research is to study the questions used in the 2018 MIR exam (a test that allows access to specialized medical training in Spain), describe their psychometric properties, and evaluate their quality. Materials and Methods: This analysis is performed with the help of classical test theory (CTT) and item response theory (IRT). The answers given to the test questions by a total of 3868 physicians are analyzed. Results: According to CTT, the average difficulty index for all of the test questions was 0.629, which falls into the acceptable category. The average difficulty index with correction for random effects was 0.515, which corresponds to a value within the optimal range. The mean discrimination index was 0.277, which is in the good category, while the mean point biserial correlation coefficient, with a value of 0.275 fits in the regular category. The values of difficulty and discrimination calculated according to the model of two parameters of the IRT seem adequate with average values of −0.389 and 0.677. The Cronbach alpha score obtained for the overall test was 0.944. This value is considered as very good. Conclusions: A decrease was observed in the average values of discrimination in the last three calls, which may be related to the greater proportion of Spanish graduates that take the exam in the same year of finalization of their studies in Medicine. View Full-Text
Keywords: classical test theory (CTT); educational evaluation; item response theory (IRT); medical students; psychometry; specialization; statistics classical test theory (CTT); educational evaluation; item response theory (IRT); medical students; psychometry; specialization; statistics
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Baladrón, J.; Sánchez Lasheras, F.; Romeo Ladrero, J.M.; Villacampa, T.; Curbelo, J.; Jiménez Fonseca, P.; García Guerrero, A. The MIR 2018 Exam: Psychometric Study and Comparison with the Previous Nine Years. Medicina 2019, 55, 751.

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