Figure 1. Performance of students according to the sub-units of the task in the pre- and post-tests (n=109) and one week (8 days) after the educational intervention (follow-up test, n=106).

*Significant differences between the pre- and post-test results for all four subunits (P<0.05).

†Significant difference between post- and follow-up test for “fixation of the PVC” only (P<0.05).