Introduction.

The present work analyses 13 questions that were repeated twice in different tests that simulate the MIR exam, separated in time between 2 and 15 weeks. From the results obtained, the learning process of the students preparing for the MIR test has been analysed.

Material and methods.

For the present study, a database made up of a total of 2,600 questions which were answered on average by 1,585 students with relatively homogeneous characteristics was employed.

Results.

In general, it is possible to affirm that between the first and second exposure of the students to the same question there was an improvement in the indexes analysed. From the results obtained, it is observed that, on average, throughout the preparation, the difficulty of the questions for the group of students is reduced by half. Regarding the discrimination index, this increases by about 60%, which means that as the preparation progresses, the proportion of people who get the question right in the strong group increases with respect to those who get it right in the weak group. Finally, there is also an improvement in the value of the biserial point correlation coefficient, which implies an improvement in the discriminative capacity of the questions.

Conclusions.

As the preparation progresses, the analysed questions become easier and discriminating. In addition, it is observed how not all students obtained the same performance.

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