Ines Vuckovic/DoseInvestigating center school slumber parties’ greatest prank.

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I have a limited tolerance for staying awake — as a son I was always the an initial to loss asleep at slumber parties. Anyone knows the very first person out is the very first to gain pranked. Back then, among the most renowned pranks to be dipping a sleeping person’s hand in warm water to check out if they will do wet the bed, setting them up because that a lifetime of urine-related nicknames.

I managed to do it through middle school without ever getting urine pranked (let’s take it a quick moment of silence for those who were less fortunate). Yet I’m curious to know if dipping someone’s hand in warm water really reasons them to lose control of their bladder.

Let’s investigate.

The experiment

If you look the pee test up on YouTube — and I extremely recommend you do — you’ll watch the outcomes are inconclusive: sometimes the check works, but an ext often, it doesn’t.

But in 2009, the TV present “MythBusters” placed the entire matter to bed, so come speak. The show brought two test subjects to a California sleep lab, hooked them up to mind monitoring equipment and also lined the bed v moisture-activated voice alarms. Once the volunteer reached deep sleep, the various other volunteer snuck right into the room and dipped the sleeper’s hand in a bowl of warm water. Later, castle swapped areas so the sleeper came to be the dipper and vice versa.

Neither volunteer wet the bed. However that doesn’t mean it’s impossible.

The power of suggestion

According to a 1996 Gallup poll, 25% of all Americans determine as superstitious. This means that one quarter of the nation believes they can achieve an excellent fortune by moving a rabbit’s foot or by preventing ladders and also black cats.

Psychologists believe our expectation are an effective enough to affect the result of a specific occurrence. For example, if you understand parties do you feel anxious and also drinking wine renders you feel less inhibited, after drinking a glass you can find you yourself feeling and also behaving in a an ext outgoing manner. The alcohol didn’t do you much more extroverted — but your mind believes it did.

The same theory stop true for the hand-in-water prank. Mental Floss posits that there’s one unconditioned an answer between hearing the sound of running water and having come pee. Lock argue that dipping a hand in water might cause the brain to make a comparable connection, thereby relaxing the bladder.

Mental Floss also suggests that “immersion diuresis” might be to blame for this phenomena. Immersion diuresis is once the body is spanned in water and subjected to transforms in pressure and also temperature, causing urination. For immersion diuresis come work, however, the entire body would need to be submerged, so mental Floss doesn’t offer this concept too lot credence.

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The results

Both MythBusters and also Mental Floss contend that not sufficient research has been perform to make a definitive judgment on whether or not the pee check works. Therefore there’s only one point to it is in done: Everyone action up and also pee test a friend (or enemy) today.