Figure 3 presents the pre-test and post-test results across the different categories of educational multimedia
clips. The figure reports the results in terms of the number and the percentage of correct answers. The results of the
pre-test questionnaire show that in average across the 6 questions, only 9% of the total number of answers provided
by the 30 participants was correct. Individually across the 6 clips, 20% of the pre-test answers were correct for the
Animation clip, 27% for the Demo clip, 3% for the Documentary clip, 7% for the Presentation clip, and no pre-test
answers were correct for the Screencast and Slideshow clips. The higher number of correct answers for the
NitrogenIceCream clip could be explained by the fact that the question asked if it is possible to make ice cream
using liquid nitrogen, being more intuitive for the participants to choose the correct answer (i.e., it is possible).