 UK Biobank is a large-perspective cohort study consisting of over half a million people. To ensure accurate data collection, the researchers evaluated the performance of a touchscreen questionnaire used to collect information about participants' diets. They found that the touchscreen questionnaire was highly reliable when measuring intake of certain foods, such as fish and meat, but less so for fruits and vegetables. Additionally, they compared the results of the touchscreen questionnaire with those obtained through web-based 24-hour dietary assessments and found that the two methods produced similar results. This suggests that the touchscreen questionnaire can be used to accurately measure participants' dietary intake. This article was authored by Catherine E. Bradbury, Heather J. Young, Wenjigwa, and others.