Each person's "Dance of the rotating"

In the chapter "in the left and right brain wave test", we mentioned that the principle of this picture on the network has aroused heated discussions, even in the Psytopic no exception. On the "uncertainty about the phenomenon of" many netizens skeptical, and some users think it is in the GIF animation graphics frame cheating, some netizens from the lighting angle for analysis, the map Psytopic decomposition, this exclusion two possibilities. Like you, we are also very curious about this, the following is lightor from a psychological point of view of the principle of this picture explored. Even more interesting is that this phenomenon from physics, psychology and biology on their own can be a reasonable explanation, you may also wish to try. - Psytopic.com


(This article "in the left and right brain wave test" next, the new readers, please read Part 1)


On the "Huzuohuyou" phenomenon, many netizens skeptical, and some users think it is in the GIF animation graphics frame cheating, some netizens from the lighting angle for analysis, the members of the map Psytopic decomposed , may exclude these two, the following is from the image of an interception to section 8 (just fourth lap) GIF picture format:


The picture above carefully observed, although dance is not a complete rotary motion, but "suddenly is to suddenly reverse" the effect still exists, and is not very interesting?





Psytopic explanation

Like you, we are also very curious about this, the following is lightor from a psychological perspective of this picture principle of exploration:


Psytopic view is: detached judgement through clues, the movement illusion.

Set aside this picture, let us assume that in the real scene: a ballet dance, the dance moves are, I think you recognize one on the direction she rotation; if she gave a brief moment that photography down, and this images were compared, we will find that this picture out of the several things: the image of dancers (3-D) into a planar (2-D) of the shadow of the surrounding environment clues can be simplified into graded-looking, complex lighting only vertical reflection of the dance. This is the result of detached: you can not any static from the screen to determine the direction of rotation dance.

This gives us the brain's perceptual judgement brought thorny issues, we must come to the dance movement direction, we must find clues perception. Under such circumstances, the brain will make their own "a priori assumptions" that the first assumption of the rotating direction of dance, combined with "a screen" to verify this assumption, if set up, then we think she is indeed in accordance with the assumption that the direction of rotation, if not the establishment of the negative assumptions, another (opposite) assumptions. The question is: "a screen" is not in the static case to determine the direction of rotation. What would happen in this situation? No matter what our brains to make "a priori assumptions," (clockwise or anti-clockwise), this assumption in our view are "reasonable".


The chart is from the original GIF format images, intercepted a random:


You can dance on the map determine the direction of rotation?




Why the "suddenly is to suddenly reverse?"

This phenomenon was found on ancient Greece: If we have the opportunity to see waterfalls, try to watch the waterfall, running water, after a period of time (about 30 seconds), and then watch the vicinity of the old cliff, we will feel that since there seems to be under the cliff and the mobile phenomenon. Until 1834, Robert Addams occasionally found in Scotland this phenomenon only after the formation of the modern reports. This mobile illusion Psychologically, known as the "Vision After the elephant" or "movement like." If you do not have opportunity to visit waterfalls, we passed a short video to experience it:


This video is in Scotland to see Addams那条waterfalls, simulation, the use of QuickTime format, please check your computer whether or not to support the format.

Let us begin: watch the film Falls about 30 seconds, to keep attention focused their attention on the Middle eyes mobile waterfall flow, maintain this position, and then click the player's "pause" button (bottom left in the player's), see " cliff upstream "?


"After the visual as" phenomenon can be visually neurons "campaign profile" selective adaptation to explain. Psytopic this explanation is not made, in 1963 Barlow and Hill has been on this phenomenon had special report. In the absence of image motion, the visual cells will be adjusted to different directions, in order to maintain a balanced response. When a specific direction of movement, and change will upset the balance that the original cells, which promotes cell adjusted to the opposite direction, and then produced a wrong impression.


Almost everyone has seen the "dance of the rotation?"

Psytopic in front of interpretation, we have come to: you can not any static from the screen to determine the direction of rotation dance. Does this meet the conditions for a specific object direction of the movement can create the wrong impression? We have done experiments, interested friends can be further verified. Below is an example of life, can explain this phenomenon actually around us: look around you whether there is a fan and, if so, may wish to open, and then watch the rotating fans, in a moment, you will find the above and dance Like: fans suddenly clockwise rotation, suddenly counterclockwise rotation, and sometimes even do not have to stop feeling. Is not very interesting? Even more interesting is that in the physics of this phenomenon can be explained through the frame of reference in psychology can be like after visual interpretation in physiology can be regulated through visual cells explained, "Clause disciplines-truth":)

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