Social Desirability Bias in response to a health behaviour survey

Behavioural: All participants will be asked to complete a short (5 minute) web-based survey. The initial part of the survey will be comprised of questions about physical activity, diet, smoking and alcohol intake. All participants will answer the same questions for each section apart from alcohol where participants will be randomised to one of two groups (A or B). The Group A survey will be titled “Recent Drinking” and followed by 3 questions regarding alcohol intake over the past 4 weeks. The Group B survey will be titled “Alcohol Use Disorders” and a brief introduction will say the questions are used to identify alcohol use disorders followed by 7 behavioural questions. They will then see a heading of “Recent Drinking” followed by the same 3 questions from Group A concerning alcohol intake over the past 4 weeks. The entire web-based survey will have a median completion time of less than 5 minutes.