Effects of health warning marked glasses on alcohol consumption, alcohol urges and alcohol-related attitudes

This experimental study investigated the effects of health warning marked glasses on alcohol-related outcomes. This study used a between-subjects design with one factor of glass type (marked, unmarked). Participants (n=84) were randomised (with caveat of equal numbers per condition) to consume 500 ml beer from either a glass marked with an alcohol-related cancer health warning (marked condition) or a standard glass with no warning (unmarked). Primary outcomes were amount of alcohol consumed, alcohol urges and alcohol-related attitudes (pro-social norms, health-related attitudes and personal drinking/intent to reduce). The main findings were that participants who consumed alcohol from the marked glasses reported higher alcohol-related health concerns compared to participants who consumed from unmarked glasses. The study protocol was pre-registered on the Open Science Framework: osf.io/jgd7s.