2.7. Data collection
Participants were informed about their group assignment (intervention or control) by e-mail and were asked to complete the online baseline assessment using the Survey Monkey platform. This questionnaire included 25 questions divided into two sections: sociodemographic variables (first eight questions), such as sex, hometown, and faculty; and 17 questions about their history of alcohol consumption and alcohol-related consequences during the previous month. One month after the interview (for de intervention group) or after the baseline questionnaire (for the control group), students received an e-mail directing them to complete the 1-month follow-up assessment via Survey Monkey. This assessment consisted of the same alcohol-related questions referring to the outcome variables. If they did not complete it, they were sent a reminder and the link by the smartphone messaging app WhatsApp.