Limitations
BLIND
This study has some limitations. A systematic pre-post semester analysis and the lack of a control group of students without UR implementation are the most important. In this sense, a control group was very difficult to achieve because it was practically unfeasible to blind the students to the implementation of the RCT. However, this should be taken into account when interpreting the results obtained. In addition, a long-term view in line with other research and inquiry strategies are required to evaluate the effect on the students’ learning process. Further, increasing the sample size of students should also provide more insights into the teaching and learning capabilities of research. Finally, the lack of validated tools and the use of different points and not well-balanced scales when dimensions were assessed also could have had a negative impact.