He added: “Thus, when you restrain your urge to go to the bathroom, your self-control efforts spill over to other behaviours you’re engaged in.
“Restraining the urge to urinate helps restrain Âdishonest behaviour when cheating opportunities arise at the same time.â€
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Experts claim their findings support banning people from freshening up — to prevent lying or other deceptive conduct.
They added: “Many universities forbid students from using the bathroom during written exams, suspecting that they might cheat or get outside help.â€