Your lie will be more convincing if you have to pee when you tell it. Because of a phenomenon called the inhibitory spillover effect,’ the need to control your bladder also forces your brain to activate more self-control, which helps hide the tells you have when fibbing.
Scientists have discovered that people lie more convincingly when they are desperate for the lavatory.
If you want to tell someone a fib, then make sure you have drunk a couple of pints of water, because scientists have found that we lie more convincingly when we need to tinkle.
California State University researchers were investigating the 'inhibitory spillover effect', which is when our focus on one task facilitates the performance of another.
When you need to wee, it apparently improves your ability to tell a convincing lie.
The abstract reads, "Participants drank small (low-control) or large (high-control) amounts of water,
"Next, they lied or told the truth to an interviewer."
Then, they got third-party observers to come in and deduce whether the participants were lying or not.
People with full bladders were more convincing liars than those who had not had much to drink.
The abstract continues: "In the high-control, but not the low-control condition, liars displayed significantly fewer behavioural cues to deception, more behavioural cues signalling truth, and provided longer and more complex accounts than truth-tellers."
Scientists have said that this is because lying is an incredibly complex cognitive task, but needing to empty your bladder activates your brain's inhibition control centres.
These are the same centres that inhibit our need to tell the truth.
So, next time you tell your boss that you are off work not because you are hungover, but because you have swine flu, make sure you've had a few cups of tea first.