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Which Direction Does She Spin? Answered

Check out the optical illusion below. Since the figure is totally black, there's no depth- you can see her spinning either clockwise or counter-clockwise. Which way do you see it first? Try reversing the spin direction- moving your finger in a circular motion at the rate of rotation can help you reset. How easy is do you find it to swap perspective? Does it make your brain hurt?

Discussions

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FFVIIBOY
FFVIIBOY

10 years ago

dude i was just looking at this and she was counter clockwise and all of a sudden she stopped and went the other way!

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fungus amungus
fungus amungus

13 years ago

Wait a sec... what about the shadow? It would only appear on the back side so then she really is moving CCW.

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Goodhart
Goodhart

Reply 13 years ago

Not if the light comes from behind...

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fungus amungus
fungus amungus

Reply 13 years ago

Well, the light is coming from behind, but that doesn't change anything.

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Goodhart
Goodhart

Reply 13 years ago

If you look at the shadow, then the rotation of the figure. Get it to reverse, and watch the shadow again. It moves nearly straight across so whether it "goes behind or in front" is how you perceive it, since this is a flat 2 dimensional figure, it really only oscillates back and forth and does not go around in either direction. I can see this especially with the lowest foot and the shadow. Granted, I have an odd sort of perception when it comes to many optical illusions. Most times, I can "flatten them out" and perceive the actual 2 dimensions only", but this has it's disadvantages. Often I misperceive "real space" and my depth perception is sometimes off. Parallel parking is a nightmare.

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fungus amungus
fungus amungus

Reply 13 years ago

The shadow does not move straight across. If it did, it would appear for the entire animation. In fact it carves out an elliptical shape.

The fact that the shadow only appears during half of the animation means that during that half the foot is further away from the camera and is able to cast the shadow. I think this effect is lessened because she rises during that half, but it's still there.

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Goodhart
Goodhart

Reply 13 years ago

Yes, but the curve is slight enough that one can perceive it moving in either direction since the curve would be equal no matter which "side to side" movement one observed. I know, it is hard to break free of the illusion of depth, and just see the figure move back and forth (that is, switching directions continuously). It requires one to alter the "starting point" with each half cycle of oscillation. Believe me, it "can" be seen as moving in both direction :-)

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royalestel
royalestel

Reply 13 years ago

You don't see enough of the reflection to interfere too much with reversing the rotation, but if you actually did see more of it, it would be more difficult.

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Goodhart
Goodhart

Reply 13 years ago

As it is, it actually helps me "reverse the direction" of the imagined rotation; that and the lowest foot.

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its a lion
its a lion

Reply 13 years ago

i know about bad depth perception... born blind in my left eye.

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Goodhart
Goodhart

Reply 13 years ago

Oh my, I am sorry. Mine has to do with the way my brain interprets the surroundings...I CAN override it with training, but the world is really a strange place "visually" to me. The optical illusions that I have seen over the years, can be wiped flat, and those pictures hidden in the color dots (I forget the name of them), some days I can see them right away, and some days I can't see them no matter how hard I try. If nothing else, I am able at times to see things I wouldn't normally see.

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Patrick Pending
Patrick Pending

Reply 13 years ago

That's not a shadow it's a reflection. Cheers, Pat. Pending

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fungus amungus
fungus amungus

Reply 13 years ago

Doesn't change anything, though, as it implies the same thing.

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Patrick Pending
Patrick Pending

Reply 13 years ago

I'm not sure I get what you're saying, the reflection seems (to me at least) to be consistent with rotation in either direction. Cheers, Pat. Pending

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royalestel
royalestel

Reply 13 years ago

Yeah, you're right. The reflection gives it away. Crop that out, however, and you'd be cookin wit grease!

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Patrick Pending
Patrick Pending

13 years ago

By concentrating on the foot of the supporting leg, I can now get it to switch at will - at least most of the time. Pat. Pending

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trebuchet03
trebuchet03

13 years ago

So what does it mean when it's easy to swap perspective? I love illusions like this :) On occasion, I've been able to swap without blinking - sometimes it helps to look in a different direction while keeping it in peripheral vision (which works better with movement). And what does it mean if the "default" is always in one direction? That is, do something else for a few minutes and come back -- does it always spin in the same direction at first? For me, it appears to be yes - and CW. Thanks for posting :)

Both the right and left hand are moving is the clock wise direction. Remove the clock fromt he wall and keep it on the floor and observe it and compare it wihtt he illusin given here she is spining clock wise

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Garth Knight
Garth Knight

13 years ago

Does it matter which way she spins? how about a name, or a number?

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T3h_Muffinator
T3h_Muffinator

13 years ago

Hmmm... I've got it going CW and CCW, but the most amusing thing to do is to blink your eyes at a constant rate, and make it go backwards..... which is really forwards....... interesting....

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Weissensteinburg
Weissensteinburg

13 years ago

I saw it CW at first, and had a few glimpses of CCW...this is creepy, but doesn't hurt my brain...at all...weirdos.

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Weissensteinburg
Weissensteinburg

Reply 13 years ago

I just tried it with my mom...we see it switch at the same time..we think it's switching on it's own.

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canida
canida

Reply 13 years ago

Just wait- you can both see it spinning in different directions at the same time. It's easier for me to make the switch if it hangs for a second, which is probably what's going on for you and your mom.

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Weissensteinburg
Weissensteinburg

Reply 13 years ago

No...it was spinning constantly, and at the same times, it would appear to switch.

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its a lion
its a lion

Reply 13 years ago

its not, i just opened it up to see. no switch she just spins.

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Goodhart
Goodhart

Reply 13 years ago

Nor mine and I was able to "stop the spinning" altogether, and just watch her oscillate back and forth.

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its a lion
its a lion

13 years ago

i was about to say that i can only see CC, but then she started spinning clockwise... thats a great illusion. too bad i cant hang it on my wall with the other.

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Goodhart
Goodhart

13 years ago

I find this an easy way for me to "reset", if I scroll the image down so I only see the upper half, she spins one way, viewing the whole figure reverses it. Weird thing is; if I look away, look back and she is spinning differently then before while view the upper half, viewing the whole figure helps reset it the opposite way anyways. Looking at it too long, and it appears only to be moving back and forth, and not spinning at all. :-)

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crestind
crestind

13 years ago

I can only see clockwise

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Patrick Pending
Patrick Pending

13 years ago

That's a really good illusion. I have seen this before with rotating cubes, but this is far more effective. Cheers, Pat. Pending

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Easy Button
Easy Button

13 years ago

Um I can only see it spinning right\counter clock-wise. I'm getting kind of dizzy.

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theque
theque

13 years ago

oops i mean cw first then i was able to switch to cc

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theque
theque

13 years ago

at first i see her spinning right, then i was able to switch the direction of spin. Gave me a bit of a headache trying though XD

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fungus amungus
fungus amungus

13 years ago

I only see it moving CC. OK, my head hurts and I need to print some stuff.