Effect of self-assessment on test scores: student perceptions.

After a sudden increase in most of the individual grades in a multiple-choice test, students were asked to rank the three most relevant factors responsible for this outcome. Among eight others, the availability of a test for self-assessment before the final test was by far the most frequently mentioned (82.4% of the students). Questions applied during different course activities did not have the same effect on student scores as the "online" self-assessment test.