Engagement
The median time to complete the survey was 9.45 min (range = 4.87–85.25 min). The median time spent looking at the information leaflet (including the compulsory 3 min) ranged from 3.10 min (range = 3.02–29.28 min) in Condition 16, to 3.58 min in Condition 12 (range = 3.02–37.67 min) (