OVERCOOKED your CV? Drink a large coffee before going into the job interview: people seem to lie more convincingly when they are suppressing the urge to urinate.

Iris Blandón-Gitlin of California State University in Fullerton and her colleagues asked students to complete a questionnaire on controversial issues. They were then interviewed by a panel, but instructed to lie about their opinions on two issues.

Before the interviews began, half the students drank 700 millilitres of water. The other half drank 50 ml.