Baladrón Jaime, Sánchez Lasheras Fernando, Romeo Ladrero José María, Villacampa Tomás, Curbelo José, Jiménez Fonseca Paula, García Guerrero Alberto
Curso Intensivo MIR Asturias, c/ Quintana 11A, 33005 Oviedo, Spain.
Mathematics Department, Faculty of Sciences, University of Oviedo, c/ Federico García Lorca 18, 33007 Oviedo, Spain.
Medicina (Kaunas). 2019 Nov 20;55(12):751. doi: 10.3390/medicina55120751.
: 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. : 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. : 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. : 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.
本研究的目的是研究2018年MIR考试（一项允许进入西班牙专业医学培训的考试）中使用的问题，描述其心理测量特性，并评估其质量。本分析借助经典测试理论（CTT）和项目反应理论（IRT）进行。分析了总共3868名医生对测试问题给出的答案。根据CTT，所有测试问题的平均难度指数为0.629，属于可接受类别。校正随机效应后的平均难度指数为0.515，对应于最佳范围内的值。平均区分指数为0.277，属于良好类别，而平均点二列相关系数值为0.275，属于一般类别。根据IRT的双参数模型计算的难度和区分值似乎足够，平均值分别为-0.389和0.677。整个测试获得的克朗巴哈α系数为0.944。该值被认为非常好。在最后三次考试中，观察到区分平均值有所下降，这可能与同年医学专业毕业的西班牙毕业生参加考试的比例较高有关。
