Optical Illusions - Kindly sent in by John Franklin Additional material by Debbie and Kathryn
Optical illusions are always fun to try. Our brains have evolved to make assumptions quickly, if one object appears bigger than another it is
probably nearer. Optical illusions exploit our brains to construct a
false visual image, or an optical illusion.
Can you control the circling motion by relaxing your eyes?
What Guy found was that he
could control the spinning by widening his eyes, developing a sort of far-away look.
One teacher said, 'I felt like they were all moving... but slowly. Kinda
like they were breathing.'
A pupil said 'Cool optical illusion', my eyes could play with dots
Optical Illusions such as this are used to test the level of stress a person can handle. The slower the pictures move, the better your ability of handling stress.
Alleged criminals that were tested see them spinning around madly; however, senior citizens and kids see them standing still.
By the way, the above image is not animated; all the dots are perfectly
Relax. Stare at those four central dots for about 20 seconds.
Look away at a wall.
Who do you see? Jesus or Che Guevara?
If nothing happens with the face optical illusion, try again this time stare for 40 seconds. When you look at the wall blink a few times and relax your eyes, develop that far-away look. Finally, try a white, or light wall.
When it works this really is a cool optical illusion.
According the perceived wisdom of the fashion-police, vertical stripes
make women look thinner. However, when put to a scientific test at
York University, England, the results proved the opposite. What
psychologists found was horizontal stripes make you look thinner. What
they found was that horizontal stripes create the illusion of depth, which
in turn can reduce the appearance of width. Volunteers were asked to
compare 200 pictures of women wearing either horizontal or vertical-striped
outfits. The results were horizontal stripes were perceived to
be thinner by 53% of the volunteers, against 47% who agreed with the
traditional view that vertical stripes were slimmer.
are not convinced and say the experiment should be repeated with real women
walking down the runway.
How To Get the Spinning Girl Optical Illusion to Work
Let me say straight off the bat, Guy thought for a long time that the dancer
could only possibly spin one way clockwise. Three things helped me
to see her spinning both ways: belief I WILL GET THIS TO WORK. Also, a
practical point, the first picture I studied had the animation running too
fast. So the slower the spinning, the
better your chance to see this illusion. One more tip: try focusing on the
left edge of the picture, then slowly pan your eyes to the right. This is
how I got her to spin clockwise.
Will said that looking at the dancer's feet helped him to the her turning
anti-clockwise. John said that with the spinning girl optical illusion it was concentrating on the shadow that enabled
him to switch directions.
way does the dancer spin, clockwise or anti-clockwise?
Dancer spins only clockwise: 33%
Spins both ways, mostly clockwise: 32%
Spins both ways about the same: 18%
Dancer spins only anti-clockwise: 8%
Spins both ways, mostly anti-clockwise: 8%
Four times as many people see the dancer spinning clockwise as
Those that see the dancer spinning clockwise use more of the right side of
their brain than the left. Will and Guy wonder if there is a relationship
between the direction you see her spin, and whether you are right handed or
* This is an animated gif. If the dancer does not spin, it maybe
because of a restriction in you browser.
History of the Spinning Dancer Illusion
The spinning dancer illusion was born out of a Yale university project to test
for 'Left Brain' or 'Right Brain' dominance. The study was started by
Roger Sperry who was investigating epilepsy and left / right brain neural
Left Brain Functions Perhaps speech is the most important left brain function. This
left side also processes maths and logic.
Right Brain Functions The right brain is the locus for spatial awareness, imagination, fantasy
also risk taking.