Health warning labels
For the experimental stimuli, we used images of a conventional beer can (355 mL) with a fictional design and brand. The beer displayed one of three labels on the front panel: I) no label control, II) health warning label in red (HWL red), and III) health warning label in yellow (HWL yellow). In the control condition, participants were shown the beer can with no warning label. In the intervention groups, pictograms and legends were located at the top, covering a little less than one-third of the front of the package as proposed by WHO Europe [General design of the beer can by experimental condition