[Credit: Internet Movie Database]
[Credit: Internet Movie Database]

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Does the “Right Brain vs. Left Brain” Spinning Dancer Test Work?

- asks Aki from San Francisco

A new “brain test” floating around online shows a spinning dancer and asks whether you see the image rotating clockwise or counterclockwise. If it spins clockwise, you supposedly use more of your right brain. Counterclockwise, and you’re more of a left brain person. The test then lists functions associated with each side of the brain – the left side includes “uses logic” and “facts rule,” while the right side includes “uses feeling” and “imagination rules.”

A good friend complained that the test told her she was a left brain person, even when she knew herself to not be into left brain associations such as “math and science.” A similar discrepancy was discerned by one of the authors of the Freakonomics blog, when he conducted a quick, nonscientific survey of blog readers, which cross referenced college majors and spinning dancer test results.

If the test sounds flawed, that’s not just because one shouldn’t use spinning dancers to characterize their brain strengths. Rather, the test is coming up inaccurate because it provides a crude view of the “lateralization of brain function,” or the concept that each side of the human brain specializes in certain mental activities.

The concept was born in the 1960s, when Roger Sperry studied epilepsy patients who had had a nerve connection between their hemispheres surgically cut. He found that the left brain hemisphere seemed to possess “speech and a rational, intellectual style,” while the right side was “inarticulate, but blessed with special spatial abilities.”

Modern neuroscience studies using brain imaging technology such as fMRI – which shows active areas of the brain while a person is trying to perform a task – have further suggested that language ability tends to be localized in the left hemisphere, while spatial ability tends to be in the right hemisphere.

However, neuroscience-minded blogs like Neurophilosophy point out that doing any complex mental activity requires cooperation from both sides of the brain, although certain processing tasks required for that activity may be concentrated on one side or the other. In other words, saying that “math and science are left brain functions” is an over-generalized statement.

“It’s not that you have a special math module somewhere in your brain, but rather that the brain’s particular functional organization…predisposes it towards the use of high-level imagery and spatial skills, which in turn just happen to be very useful when it comes to doing math reasoning,” said Michael O’Boyle, a psychologist at the University of Melbourne, Australia, in a public statement through the American Psychological Association.

In fact, the best math students don’t even seem to settle for being “left brain” people. A study undertaken by O’Boyle found mathematically gifted students did better than average students on tests that required both halves of the brain to cooperate. This demonstrated that, while the typical person might lean more heavily on one hemisphere or the other to do mental tasks necessary for math calculation, the brightest among us can more fully integrate both hemispheres of the brain.

The idea that emotion processing only occurs in the right brain hemisphere and fact processing in the left is also misleading. Brain imaging studies have showed that people processed emotion using small parts of both brain hemispheres.

“The popular notion of an ‘emotional’ right hemisphere that contrasts sharply with a ‘rational’ left hemisphere is like a crude pencil sketch made before a full-color painting,” noted a 2005 Scientific American Mind article.

Believing in left brain or right brain people also fails to account for the human brain’s mysterious flexibility and plasticity. People who had half their brain removed encounter some problems – like not being able to move or see from one side of their body – but largely retained or relearned mental abilities such as language in their remaining brain hemisphere. All this research clearly points out that while Nobel winner Sperry was onto something with his lateralization research, trying to fully compartmentalize mental activity by brain hemisphere is imprecise.

So what does the spinning dancer tell us? The whole test is more of an optical illusion than anything else, according to Steven Novella, an academic clinical neurologist at Yale University School of Medicine who blogs on NeuroLogica. When our brains process visual images to make some order or sense of the world, they have to make assumptions. The dancer is just a two dimensional image switching back and forth, but our brains process it as a three dimensional spinning object.

Depending on the assumptions made and visual cues picked up, your brain can make the dancer spin either way. When my friend first sent the test to me, I saw it go clockwise…then switch to counterclockwise as I was staring at the screen. What this tells me about my personality and mental abilities is hardly a no-brainer – the brain test connection to our mental strengths and weaknesses is nonexistent.

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78 Comments

  1. Wow - staring at the illusory dancer is really a great way to avoid working. Despite all the right brain, left brain talk, I find it to be delightfully mindless!

  2. Thanks for clearing this up. I had been wondering about the actual science behind the dancing spinner since I first saw it a couple of weeks ago. I had a hunch that left vs. right brain couldn’t be so simple…

  3. A. I have to agree with Christopher I.

    B. No matter how I look at it, she’s spinning clockwise. I know it goes the other way, because other people have told me so. Does that mean that I’m an unimaginative right brained person?

    I’m with Jeremy, I think this is bunk, but a really cool optical illusion.

  4. Yeah I really don’t understand. I’ve stared at it for like a half hour, and I CAN’T make it spin counter clockwise. It will ONLY spin clockwise…sigh.

    .moses.

  5. I love this optical illusion. The key is to figure out which leg she is pivoting on, right?
    Kathleen

  6. Good article! I publish a poll / survey to know what is more common, saw her spinning clockwise or anti-clockwise. Here is it:
    Right Brain vs Left Brain Survey / Poll - Mind optical illusion

  7. You have to visualize it spinning the other way and focus on small details, then try to change them. If you look at her arms or her lower foot, as opposed to the whole thing, you have a lot more grasp over which kind of cue you get from it. And once it switches, it seems as if you’ve always seen it from that way. I’ve yet to consciously and consistently do it though. I can switch about once every 20 seconds.

  8. I can make her kick one foot in front alternating legs, but it gives me a headache after several times.

  9. When I first saw it, it was going clockwise then while i was reading the paragraph to the left she started going the other way and i could get her to go back and forth.. it’s interesting.. but I understand the above article that it’s worthless really.
    o well.

  10. Here’s the trick to making it change directions-don’t look at it DIRECTLY, but look to one side or the other. I did this and made it change directions but when looking directly, it just went clockwise. I agree, cool trick and takes my mind off…homework. Awesome!

  11. If you want to make her switch directions try to touch your thumb to each of your 4 fingers in order back and forth QUICKLY & watch her spin. Now try it on the other hand. I was bored and can make her turn almost instantaneously doing this….cool distraction from grading my Calculus papers with my Left hand..haha

  12. I don’nt understand why i can’t make it turn clockwise, I always see it turn counter no matter how I try, Is there somethng wrong with my brain or am i a special person..hmmm

  13. I found if I watched her for long enough she started to undress and do this really hot dance! Then it was really hard to stop watching and get any work done.

  14. I found this not only interesting because I went through brain surgery for epilepsy- but also because I had made music boxes for my neurologist and neurosurgeon that played music from the Wizard of Oz. Also- last night I was walking with a group dressed up characters from the Wizard of Oz- I was the Scarecrow- and it was odd that Stumble sent me to this one today.

  15. Wow….
    This only proves that dancing is a great exercise.
    what a body!!!
    If you don’t over analyze the dancer and just look at the “big picture”, you will see her in a fan mode, gently going back and forth. At least this is the way I see her…..

  16. Hey, Dakota, Moses and Jon:

    At this website - http://ofb.net/~whuang/imgs/spin/ - there are modified versions of the dancer that help you see both directional views, together with the original. Take a look!

    I found that if I clicked ‘Hide’ for the picture with the direction I naturally saw (counterclockwise) and stared at the other two, I could make myself see the original dancer turn clockwise. Now whenever I see the original dancer, she flips back and forth randomly.

  17. Do you see the survey results? very interesting:
    Right Brain vs Left Brain Survey / Poll

  18. It’s a sham.

    If you freeze the spinning girl at a certain point, you see that there is actually a slight line on her right thigh that prevents her from appearing to move clockwise:

    http://img87.imageshack.us/img.....irlhq7.png

    So that would be why so many people are having trouble with it.

    Don’t tell me I’m the only person who’s seen this!

  19. this must be a guy’s idea of a dancer. one with boobs (or a boob job). it don’t work that way, folks.

  20. Most people can see it going both ways…….because you have two sides to your brain. Hello. Its just with some people one side may completely overides the other depending on how dominant that side is. Its about spatial relationships and the brains ability to fill in missing detail. If you can do this well you will see the dancer spin clockwise.

  21. I keep on staring at the dancer and thinking: So peole can actually see her going counter-clockwise? I can’t even imagine her going counterclockwise!

  22. I got this dancer in email. It started out clockwise and then went counter clockwise. It changed a couple times and then stayed clockwise. Your explanation solved a lifelong mystery for me. When I was growing up in the late 1940’s we would go to Laguardia airport to pick up my dad from a business trip. There was a radar antenna turning on the roof of the terminal building. I would look at it as it would switch between clockwise and counter clockwise. I knew that it wasn’t really changing direction.

  23. i can only see clockwise. i must be weird…….

  24. The site http://anuragworld.googlepages.....ningdancer explains the reason for the illusion very well. It also has a trick for those who can see the dancer rotate only clockwise or anticlockwise.

  25. How can anyone see it spinning clockwise, I can’t understand at all. It’ just counter clockwise for me and I’m trying really hard lol.

  26. If you can’t see the change try taking your hand off your mouse, or move you mouse to your other hand. Or try holding something in your left hand and making counter clockwise circles.

  27. all you have to do is look away from the screen or close your eyes when her leg that’s sticking out is about to go behind her. then, at least for me, she changes direction. but don’t close them for too long or she will switch again. freaky!

  28. What does it mean when she is going back and forth instead of making a complete circle?

  29. If I look at the silhouette first, it spins clockwise for me. But the shadow below spins anti-clockwise for me. So if I look at the shadow first, then the dancer spins anti-clockwise. Very odd.

  30. i swore this picture was rigged to spin both directions until i downloaded the gif and counted each time the thing would do a full spin each way…

    what a waste of time.. i feel stupid -_-

  31. I’ve spotted a flaw! That reinforces the clockwise direction.

    The proportions of her swinging leg are fine to the left side of the picture, but there is a software fudge going on on the right side: if she were spinning clockwise we would expect to see her toes progress toward us first, if anti-clockwise her heel would progress away from us first (on the right side of the image remember). This is not so, because both images can’t be generated together, they’ve used one. Sneaky but inevitable!

    With that in mind I can get her spinning in either direction and have managed to get her to flip left and right without taking a complete revolution.

  32. stare at her foot and concentrate on the foot and soon it will change.

    if you normally see it going clockwise try to see the bottom of her foot.

    if you normally see it going counter-clockwise try to see the top of her foot.

    it worked for me… i feel like im mind controlling my computer.

  33. I think it has to do if your right or left eye is dominant. I am severely right-eyed, and my partner is severely left-eyed. I had a time making her go anti-c. Just a thought.

  34. Thanks so much for the article. My daughter had me freaking out because the direction flips back & forth as I look at the dancer. Hers only spins in one direction. I emailed it to her.

  35. What if you take succesive snapshots of her after every (say) a millisecond. That will tell you which way she is spinning ..and no left or right brain involved..?
    Somebody answer.

  36. Damn!
    I had a science project with this in it!
    Already got an A= though :P

  37. At first, I saw it anti-clockwise, and then after a few seconds it changed to clockwise…

    After concentrating, i was able to see it going back and forth, never completing a whole turn, which was really cool!

  38. Most interesting thing I learned is that some people say “anti-clockwise.” I always thought it was only “counterclockwise”

  39. Ok…i couldnt really see the counter clockwise either UNTIL i stared at the shadow on the ground then she just started spinning the other way!..try it

  40. CHRISTOPHER’S COMMENT IS POINTLESS! OBVIOUSLY, HE DOESNT LIKE WORKING EITHER. OTHERWISE, HE WOULD FIND TIME TO 1) LOOK AT THE ILLUSORY DANCER & 2) TO POST A COMMENT!

  41. That’s definitely the best optical illusion I’ve ever seen. It’s shadowy eye candy questioning reality…

    After spending considerable amount of time with looking at her do her thing, I was bewildered, I started to wonder if her making a counter clockwise movement was even possible. What was even more distressing was my perception putting me in the category of not thinking with reason… needless to say I wasn’t happy… I looked at her feet, hands, shadow below and the arch in her back to know the front and back body positions and I still couldn’t see a change in movement.

    Then I had a eureka moment. I thought perhaps I need to change my movement to see her change her movement. I looked a away from the screen and glimpsed at her with the corner of my eyes to try see the change… no change… then I put my head down nearer to the keyboard till the image became more dark and when I looked up… voila… there was a CHANGE in movement. It happens every time I do it.

    I think it has something to do with the light. Nice tricky perception.

  42. It’s crazy, I can make her change directions…what does that mean?? It’s wierd though. When I change directions, she’s on opposite legs….

  43. at first she goes anti clockwise then she changes to clock wise and so on,but she changed legs also one time right and one time left …check it,
    i think its designed to go bothways to appear as if it changed dir. with concentration …

  44. The secret as I see it is that it is an impossible picture of the spin. It has clues embedded in the picture for both directions.
    If you look at, or concentrate only on, the lower legs and the shadow, she spins counter clockwise. If you look at, or concentrate only on, the body position, she spins clockwise.
    Try covering the body and the legs alternately and see what happens.

  45. I’m with ilia (12/03 comment). Dancer went both clockwise and counter clockwise. I was able to change the direction of the dancer when I concentrated on her feet.

  46. Actually…

    There is no right or wrong way to look at the image.

    A little more detail and she goes wherever one wants her to go. The perception of circular motion depends upon where the mind imagines the curving line of her outer and inner thigh is positioned…

    Here is clockwise… http://www.randominc.net/spinn.....gif… and here is counter clockwise… http://www.randominc.net/spinninglady/right.gif

  47. There is no right or wrong way to look at the image.

    A little more detail and she goes wherever one wants her to go. The perception of circular motion depends upon where the mind imagines the curving line of her outer and inner thigh is positioned…

    Here is clockwise… http://www.randominc.net/spinninglady/left.gif and here is counter clockwise… http://www.randominc.net/spinninglady/right.gif

  48. I first saw it as counterclockwise. Then I read it was possible to change my perception
    I remebered something. I have the ability to change my perception, to create my reality. You think I would have a better paying job!

  49. You can have her rotate to either directions at will by closing your eyes for a second or two whenever you want her to change direction.

  50. After watching her turn, first counterclockwise, then, after concentrating on her foot, clockwise, and back again several times, I came to this conclusion: she’s got a sweet figure, and I would watch her turn in any direction she wanted to.

  51. it all depends on where you statring at the time. when the thighs line up and what your thinking will determine what dorestion. CRAZY!

  52. I first saw the dancer spinning clockwise, then after looking away for a few seconds I could see her spinning counterclockwise. Just for the record, I’m ambidextrous.
    Johnny

  53. To switch her direction, realize that you have to switch your image of what foot is held outward. close your eyes and believe that her left foot is held out and the image will switch.

  54. When her right foot is out she will spin clockwise, if you can imagine her left foot out she will spin counterclockwise

  55. Hey, whatever. Nice legs.

  56. i tried for like an hour to make her move anti clockwise and all i could see was her going clockwise then my 6 yo sis came in and moved her finger the way she saw and i concentrated on both and her finger changeed direction and hey presto the dancer changed i still cant do it just in my head but if i move my finger anticlockwise the whole time the dancer changes there you go!!!!!

  57. I have taken many tests to determine which side of my brain is dominant. I’m positive it is right in my case. The spinning dancer confirms it as well. However, a person may experience a different result depending on the conditions at the time the test. Looking at her bottom foot and shadow triggers a flip because you are looking for logic/reason to explain what you see, failing to find it your brain tries different approach. Closing your eyes works too, since one side of the brain is visual and the other is imaginary.

    You can actually train yourself to flip the spin as you like on demand without looking at her feet or closing your eyes.

  58. I think we can say this illusion is NOT a definitive diagnosis of whether or not you are right or left brain oriented.

    However… it can be a useful tool to lead you into more testing and further research into who you are, and what your strengths & weaknesses may be.

    I’ve always heard that humans use about 10% of their brain capacity, so there’s a lot of wasted power from the start. Divide that between 2 hemispheres of the brain, and VOILA! More laziness. Put 2 people on one task, and one will always end up doing more work than the other.

    As for myself, I’ve taken IQ tests over the years, and the results show I am definitely a right-brained person with an IQ in the 130-140 range. They say I’m a “Visual Mathematician.”

    I see the dancer spinning clockwise, but with extreme brain effort and lots of coffee, I can make her go counter-clockwise. Thanks!

  59. This was a nice diversion. The dancer was spinning in a circle counterclockwise at first and continued for several spins until I read that it could go the other way-then she changed directions. After a moment she stopped spinning and just went back and forth not making a complete turn. I wondered what happened till I found this blog. What does it mean if she can go either way or side to side at will? Making her do this gave me a slightly dizzy feeling after several minutes. It was interesting and fun.

  60. Wow - I had her rolling around on the floor with me and going in both directions. Oh wait a minute - was that my second or third glass of wine?

  61. Stare at her long enough and a magical pole appears and she begins a very naughty routine….yea dancer!

  62. I was going crazy because I could only see it spinning clockwise. Then, I took Lucky’s advice and tried lowering my head down below the screen:

    “then I put my head down nearer to the keyboard till the image became more dark and when I looked up… voila… there was a CHANGE in movement. It happens every time I do it.

    I think it has something to do with the light. Nice tricky perception.”

    When my head is below the monitor and I look up at the dancer, I see it spinning counter clockwise. If I look at it straight on, I see it spinning clockwise. Amazing! And if I bob my head up and down, it’s like she she switches direction mid-circle and only rotates back and forth 180 degrees. Cool optical illusion.

    I doubt that the generalization is very accurate, as this article describes. I’m supposed to be right brained and creative…I wish! In high school, I used to be good in art…but only at replicating other pictures. If I ever had to create anything, it was usually pretty derivative, or crappy. If I’m not left brained, and I’m not right brained, maybe I’m no-brained! Perhaps that is the reason for the monkey sitting on my shoulder telling me what to do…another banana?!

  63. So are there scientific reasons why some people tend to see it one way more, and other people tend to see it the other way? Does it have anything to do with our brain functions, even if it is not as simple as a left-brain right-brain divide? I’d be curious to learn more about the science behind how this visual illusion works.

    (Also, even if the left-brain right-brain characterization is an over-simplification, could it have SOME influence on how we see the dancer?)

  64. maybe you could try staring at its shadow then realise that the shadow is just coming in and out of the picture, then somehow put that thought onto the dancer itself by slowly moving up. then you can do this by lowering your eyes to the shadow everytime her foot reaches to the edge of the picture, you might find her just going back and forth too…not rotating…however, according to elizabeth, the picture might be buggy, which is true, leading to some of us actually visualising the line down her thigh. i think.

  65. Who cares she can dance for me anytime.
    Kenny, Put down the Cheetos.
    Jeff, no couch dances

  66. The characteristics of the left and right brain may be accurate but ido believe that the control the brain has over movement such as body parts and sight may be inverted or reversed such as the left side of the brain controls the right arm and right brain the left arm. My wife had an injury in her left frontal cortex and her right arm,side, and leg had suffered because of it. I believe that counter-clockwise is right brained and clockwise is left when viewing the dancing illusion. Clockwise may come naturally viewed as moving right which may be controlled by left brain. I remember reading some things like this in pysch 101. I may be wrong.

  67. Hi Jeremy

    I always think its good to question but in the same way that the dancing lady may not prove the truth about how our brain works, you can’t really use it as a basis for discrediting theories on how it does work! What matters most I believe is the effective use of ones brain and continously exploring new ways of thinking. Knowing exactly how it works and proving or disproving theories about how it work is not as important. Afterall even the cave man was able to use his brain to some degree and had no idea how it worked. So lets not get caught up in arguing about the workings of an organ that is constantly evolving and lets instead focus on how to use it better!

  68. For me, I can make the dancer switch at will. If I want her to spin counter-clockwise (left-brain), I read something on my computer screen, and in a second or 2, she’s spinning counter-clockwise.

    If I want her to spin clockwise (right-brain), I try to be more “visual” and try to notice the different shades of color around the picture or notice other color things, and in a second or 2, she’s spinning clockwise.

    I think it’s really neat. It always works like that for me..

  69. Ok, disregard that last post. I can switch it by just looking at the shadow of her foot at the bottom. I guess it’s just an optical illusion..

  70. Same as David K.’s first comment: as I started reading thetext on the website, the dancer suddenly started to sping counter-clockwise.
    After walking away and comind back, I mindlessly looked at the screen and she was going clockwise again. Started typing-switched to counter-clockwise….and so on.

    I can’t look at her foot, though…if I do, she “stops spinning” and it’s as if i was looking at a statue from different angles.

    It’s a really really nice optical illusion!

  71. For me the dancer wasn’t spinning at all..It looked more like it was doing the can can. it just flipped back and fourth and back and fourth.

  72. it’s all in the shadow! :) And she is gorgeous (the model, not the shadow) Counterclockwise

  73. Very strange! At my initial look the dancer appeared to be going clockwise, but on my second counter-clockwise. After seeing it the second time, I coud not perceive it going clockwise anymore, I had already conditioned my expectations to interpret the movement.

  74. Alright the way to see both clockwise and anti-clockwise is to look at the dancers reflection at the bottom of the screen. At first the dancer appeared to be clockwise and then i glanced at the reflection and looked at her feet move differently, then she was moving anti-clockwise

  75. I have always considered me a bit more “left brained”.
    But the dancer did spin clockwise! I tried to think about her spinning the other way, but it didn’t work. But yesterday, I checked it up again; and now she was spinning anti-clockwise!
    Its a really cool illusion, but as you said, I dont think it tells us much about our brain.

  76. This is a really cool illiusion. One of the best I’ve seen really. I naturally see it clockwise and could find no way to see it anti-clockwise. If you’re the same (or if you’re the opposite, try the inverse): cover the bottom half, look away so it’s in the corner of your eye and tell yourself it’s going anti clockwise. If that doesn’t work, trace her higher moving foot with your finger on the screen. Notice it’s an oval? Now you see the foot moving in one direction. Imagine though, instead of the foot being at a high point when away from you, it’s at a high point when closest to you. Tell yourself: no, it’s actually a high point when it’s close to me, it’s moving anti-clockwise. You should then see it moving anti-clockwise with some concentration.

  77. I’m glad this test isn’t accurate, when I watched her, she kept changing direction every couple of rotations, I was getting motion sickness…but worse than that, I was starting to think I was a bit of a headcase because no one else at my work had the same reaction!

  78. I can make her switch to CCW but it makes me feel a bit nauseous & slightly paranoid - uncomfortable. but when she pirouettes CW it becomes soothing.

    Maybe it would make a difference if she was a bit more modest and put some clothes on - perhaps an XXL burka would make her look like a sphere which would then stop all the spinning.

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