Randomization

The allocation of participants to trial groups was performed after collecting the sociodemographic data. These data were needed for the creation of the login name on the Université Laval platform, and were therefore, mandatory for accessing the training. For simple randomization, before the study started, the polling firm generated a random allocation sequence by computer, enrolled participants, and assigned them to one or the other of the study groups. Participants were blinded throughout the study. However, participants could find out which intervention was the experimental one and which one was the comparator by reading the informed consent procedures (where the desired training effect was indirectly stated). The videos of experts were recorded beforehand and were delivered asynchronously so that the experts/trainers were blinded to participants. The data analysts will also be blinded with respect to allocation groups until they have completed the analysis. One of the members of the research team was not blinded, as she needed to follow the completion of the training program by participants.