One of the sure ways to bear witness your courage to all the other nestling at a slumber political party back in the day was to march into a palely light room ( typically a bathroom ) , gaze at your face in the mirror , and replicate the countersign “ Bloody Mary ” a specified number of times ( typically three , though some rendering say 13 ) . harmonize to legend , a woman would short appear in the mirror and scratch your face off — or perhaps even kill you . Different iterations of this game exist around the world ; in one , the mystic mirror woman decease by Mary Worth or Kathy , and in another , the devil himself get to an appearance .

Of course , noghostsor demons ever in reality appear , but that did n’t stop you from running out of the bathroom call , convinced that you run into a bloody face look back . Even as adults , our intellect sometimes play tricks on us . We may get spook after cogitate we see something in the mirror while arrest ready for work or sweep our teeth , even though we are rational beingness and understand that nothing is there .

However , there ’s a dead lucid account for this . The longer you stare in a mirror , the more likely you are to startseeing thingsthat are n’t there — even if you have n’t been forewarn that something ghastly will appear . This is partially due to a phenomenon call the Troxler core . When you stare at the same target for a prolonged flow of time , there comes a point when your brain adapts or gets used to static stimuli . As a result , your neurons cancel the data out , and the image often appears blurry , fleet , or distorted until you blink or look around .

If you swear you’ve seen Bloody Mary, you may have experienced the Troxler effect.

as well , if you stare into your own eyes in front of amirror , your whole face will begin to look strange if you look long enough . you could attempt thisoptical illusionout for yourself — no mirror needed .

gaze at the plus sign in the center of the image below for seven or eight seconds :

Did the colorful splodge fade to grey ? This is just one of the many ways your brain can play a trick on you and distort your sight . It ’s actually an significant coping mechanism , though . AsLive Sciencewrote , “ If you could n’t ignore the steady Harkat ul-Ansar of your computer monitor lizard , the constant smell of your own body odor , or the olfactory organ jutting out in front of your face , you ’d never be capable to centre on the significant affair — like whether your knob is standing in good order behind you . ”

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Another part of the phenomenon is the recently described “ strange face in the mirror ” legerdemain . Italian psychologist Giovanni Caputo convey anexperimentin 2010 in which people were asked to enter a indistinctly perch room and face at their reflexion in the mirror for 10 minutes . Afterwards , they were inquire to describe what they saw . Of the 50 run subject , 66 percentage report seeing “ huge deformations ” of their face , and 48 percent also saw “ fantastic and grievous beings . ” Others discover seeing the brass of a parent ( some of whom were deceased ) , the face of an animal , or the aspect of an old cleaning woman or kid .

humankind in general have a remarkable power tosee facesin everyday objects — from cloud to trees to pieces of toast — so it makes sense that dip lighting and visual prank would cause mass to see another face of some sort . In summation , when an image is distorted , your mentality draw from past experiences and expectations to fill in the gaps . Hence the deceased congeneric .

Interestingly , the same outcome “ can also be get during eye - to - oculus gazing between two individuals , ” Caputo separate Mental Floss . In fact , this “ inter - subjective gazing ” develop an even high number of “ strange faces ” seen by mental test subjects , according toanother experimentconducted by Caputo in 2013 .

So we ’ve ruled out the bearing of mirror lusus naturae , but what about Bloody Mary ? Theoriginof this particular mirror plot would seem to be tie in to “ Bloody ” Mary I , who served as queen of England in the sixteenth century — but folklorists are unconvinced .

That the figure of speech goes bymultiple name — such as Mary Worth , Mary Worthington , Mary Lou , etc.—suggests against a real person as the inspiration . Psychoanalysts have propose that the game has to do with young girls and the onrush of menstruation . Others have noted earlier parallel of the game , include aRobert Burns poemwhere he explained that if you “ [ t]ake a taper , and go alone to a take care chalk ; consume an apple before it ; and some traditions say , you should comb your hairsbreadth all the time , ” you ’ll see over your shoulder joint the face of the person you ’ll espouse ( and some psychoanalysts have even proposed an grandness of the homophone Mary / marry ) . But as far as we sleep together , no one has ever actually appeared in a mirror to support what — or who — Bloody Mary is about .

A edition of this narrative in the beginning ran in 2018 ; it has been update for 2024 .