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Oct. 12th, 2007

12:30 am - necker woman

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clockwise or counterclockwise? [source]

Via radium

Original: craschworks - comments

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From:hhallahh
Date:October 12th, 2007 07:38 am (UTC)
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That's kinda crazy. At first it was going counter-clockwise, then I looked back and it was clockwise, now it's counter-clockwise again. D:
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From:evelynne
Date:October 12th, 2007 01:06 pm (UTC)
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That's what's happening to me. This is going to drive me insane.
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From:integreillumine
Date:October 12th, 2007 09:44 am (UTC)

nipples!

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I'm not seeing the change at all - looks just clockwise. Based primarily on watching foot, torso angle, also shadow of free foot along the bottom. And yeah, most split-brain stuff presented in such a binary way is bunk.
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From:polyanarch
Date:October 12th, 2007 10:14 am (UTC)
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I'm seeing clockwise only as well. The foot shadow does NOT allow for widdershins motion unless a person was extremely unobservant. Even covering the bottom half of the picture I can't get this picture to move the other way in my head and I'm usually very good at seeing both halves of those kinds of visual puzzles quickly and effortlessly.
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From:crasch
Date:October 12th, 2007 06:19 pm (UTC)
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No, it doesn't change -- I recorded a movie of the gif:

http://www.craschworks.com/wp-content/uploads/2007/05/neckerwoman.mov

If you play with the movie, you'll see that it's your perception that's changing, not the image.
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From:jenbooks
Date:October 12th, 2007 06:34 pm (UTC)
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No, actually it doesn't. Download it and look at it frame by frame. I can (sometimes) make it go back and forth at will.
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From:saizai
Date:December 24th, 2010 01:16 am (UTC)
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Grad student here familiar with the effect.

1. The right/left brain thing in the media is almost always completely bunk. This case in particular would be absolute bullshit to apply to some purported brain lateralization trait.

2. It is NOT a trick. It is in fact a perception illusion. Keyword: bistable

Very powerful effect.
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From:flw
Date:October 12th, 2007 11:30 am (UTC)

LIARS!

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I have tried every trick and I cannot even conceive of this going counterclockwise. Not even a glimmer for half a second. I've defocused my eyes. Stared at the bottom. Scrolled down so the top of her body was off the screen. Everything everyone says. Clockwise... 100%. I think the people who are saying they are seeing it go counterclockwise ARE LYING and they need to fess up right now.

Also, I am transfixed by her nipples.
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From:vyus
Date:October 12th, 2007 04:29 pm (UTC)

Re: LIARS!

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i just used the words "cannot conceive" to describe my feelings of her going counterclockwise, as well. but following some directions in other comments here, like focusing on her foot, she flipped directions for me.

trip.
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From:flw
Date:October 12th, 2007 06:06 pm (UTC)

Re: LIARS!

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Now I went and played Grand Theft Auto: Vice City for a few hours and she flipped right around. Now I can't see it as going clockwise.
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From:peamasii
Date:October 12th, 2007 12:01 pm (UTC)
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I can only see it counter-clockwise and i've looked at it many times from different angles. The foot shadow passes in front of the other leg, which makes it impossible for me to see it as clockwise movement.
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From:waitingforoct
Date:October 12th, 2007 07:54 pm (UTC)
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ditto for me. Hey, how are you guys doing?
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From:peamasii
Date:October 13th, 2007 10:10 pm (UTC)
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hey, we're good, thanks. how is you and your boys?
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From:waitingforoct
Date:October 26th, 2007 02:02 pm (UTC)
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Pretty good, we're back in new england for a visit-first in a few years. Still enjoying Amsterdam?
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From:peamasii
Date:October 26th, 2007 02:19 pm (UTC)
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Yes, we are, Lina's job is sometimes stressful, but it's chill for me, and the kids are lovin it. My mom is coming to visit next month. It's all good!
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From:mary919
Date:October 12th, 2007 12:31 pm (UTC)
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I can make it go both ways. It's an optical illusion. Scroll up so that you can only see her bottom foot. Stare at that foot. When her toes disappear for a split second (behind or in front of her ankle) imagine the opposite and soon you'll see it.
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From:pooka
Date:October 12th, 2007 01:56 pm (UTC)
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Yep, for me, it's just focusing on the bottom foot and the shadow. Then a good blink or look away, and she's back to clockwise. Kinda fun.
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From:labrat2
Date:October 12th, 2007 02:17 pm (UTC)
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Hmmm... last night I could only see the clockwise movement. This morning, I read the comments, screwed up my eyes and really tried to see it go counter-clockwise and I finally did. Trippy.
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From:patrissimo
Date:October 12th, 2007 06:29 pm (UTC)
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thanks, that worked for me. still pretty fragile - hard to keep it in ccw.
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From:joblessmusician
Date:October 12th, 2007 01:36 pm (UTC)
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I can't seem to make her go any way but counter-clockwise... my brain must not be working!
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From:peamasii
Date:October 12th, 2007 02:22 pm (UTC)
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I think the only difference is that some people have clockwise and counter-clockwise confused. Yeah, that must be it.
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From:dorei
Date:October 12th, 2007 04:24 pm (UTC)
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I can only see it going counter clockwise no matter how hard I stare at it.
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From:vyus
Date:October 12th, 2007 04:26 pm (UTC)
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that is crazy.

i couldn't see anything but clockwise, couldn't conceive of how it could go the other direction.

then, following the direction of some comments here, it flipped for me. mindtrip.
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From:dorei
Date:October 12th, 2007 04:31 pm (UTC)
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GAH! And now all I can do is see it going clockwise. I think I must be going crazy. Either that or my psyche was most offended by being told that it didn't "get it."
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From:fishsupreme
Date:October 12th, 2007 04:46 pm (UTC)
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For me it is almost always counterclockwise; the only way I can get it to go clockwise is to cover the top half of the picture, get it going clockwise mentally using only the bottom few inches, then slowly uncover the top... and even then it usually snaps back to counterclockwise.
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From:radium
Date:October 12th, 2007 07:35 pm (UTC)

a study of meta-necker properties

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So this is a fun challenge, from a suggestion by youngwilliam:

If you have two necker women spinning side by side, can you desynchronize them and get them spinning in opposite directions, say, like egg-beaters?



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From:fishsupreme
Date:October 13th, 2007 03:50 am (UTC)

Re: a study of meta-necker properties

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I cannot.

However, in trying to do so, I seem to have discovered, for me at least, the secret in being able to visualize it in either direction.

If the extended (non-stationary) leg is in the back, the spin is counterclockwise. If it is in the front, the spin is clockwise. By concentrating on seeing that positioning right at the legs cross over each other, I can make it spin in my choice of direction.

But with two of them like this, they both reverse at the same time.
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From:adam__selene
Date:October 12th, 2007 09:17 pm (UTC)
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I can only see clockwise. I think some people need to look at a clock for reference.
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From:ladykalana
Date:October 13th, 2007 05:15 am (UTC)
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Man, that is really fucked up right here. I looked at this thing all damn day, every time I looked at my friends page I tried it. Couldn't see anything but clockwise, no focusing on feet or anything. Invited the boy in to see it, and he said, "Clockwise." I asked, "Are you sure? It's actually both, or neither. There's no frame of reference for depth..." "HOLY SHIT, it just changed!" And just like that, I saw it as well. Now she changes back and forth about every other time I blink. He watched it for a few minutes before leaving because it was too creepy.
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From:idoru
Date:October 13th, 2007 06:38 am (UTC)
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Goddammit. It took me FOREVER to get her going counterclockwise, and now that she is, I can't get her to go BACK.


And she looks like she's going BACKWARDS. >;[
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From:zzzing
Date:October 13th, 2007 07:45 pm (UTC)
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When she spins counterclockwise, the lower foot looks unnatural. I am the only one who thinks that?
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From:bigleeh
Date:October 15th, 2007 02:00 pm (UTC)
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I have worked out a method of seeing either direction at will. The key is the "shadow" of her feet. It is ambiguous too. It can be either a shadow or a reflection. If you look at the shadow and try to see it as a shadow on a concrete floor on which she is bouncing and spinning (think of a light source behind her and above) she will consistently spin counterclockwise. If, on the other hand, you try to see the "shadow" as the reflection of her feet on a shiny, freshly waxed floor she will spin clockwise.

I have tried and discarded various theories for *why* this works but it does seem to. I was quite confident I could explain it when I started typing this response but a bit of geometric doodling about the positions of shadows vs. reflections has left me more confused rather than providing much insight. There are differences in the way a shadow would move vs. a reflection but they are small compared to the vertical motion of the figure bouncing and it is difficult to sort out the two.

One thing I do notice is that the "shadow" is not quite vertical. The light source behind her (assuming a shadow) is slightly to the right of the figure causing the shadow of her leg to tilt off to the left as is goes out of frame. To get the same tilt with the "reflection" method you need to tilt the floor and, in my experience, all freshly-waxed floors tend to be fairly level which supports the shadow interpretation. Thus, I would go for counterclockwise.

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