Procedures
The online questionnaire was available from November 9, 2021, to January 17, 2022. The questionnaire included five sections that participants observed in the same order. We describe each section below.Section 1. Informed consent. This section included a general study description, confidentiality, data management, risks and benefits, and contact details. If participants agreed to participate, they were asked for an email to send a copy of their informed consent.Section 2. Filter questions. Participants with at least one exclusion criterion or who did not answer at least one question of this section ended their participation.Section 3. Sociodemographic characteristics. This section included the following indicators: educational level [1) pursuing a bachelor’s degree, 2) pursuing a postgraduate degree], field of specialization [1) physics, mathematics, or engineering, 2) biological or health sciences, 3) social sciences, 4) arts or humanities], educational and employment status [1) studying, 2) studying and working, 3) studying and looking for a job] indicators of socioeconomic status (housing floor materials and assets) and state of residence. Once the participants answered this section, the LimeSurvey platform allocated them to one of the three study groups.Section 4. Main study questions. An image of a can of beer with a randomly assigned label according to the experimental arms was presented, accompanied by questions about perceived risk, intention to change the consumption of the alcoholic beverage presented, product attractiveness, and visual avoidance (avoid seeing the can of beer).Section 5. Alcohol consumption. This section included questions related to the frequency and quantity of alcohol consumption.