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Perception
Perception
“Perception refers to the interpretation of what we
take in through our senses.
“ perception is the process by which people select,
organize and interpret information to form a
meaningful picture
Factors that Influence
Perception/perceptual
Distortions
 Factors related to perceived
 Factors related to situation
 Factors related to the perceiver
In order to make sense of our world our brains
try to see patterns or shapes that are
recognizable. This principle is called
“grouping”.
http://www.keele.ac.uk/depts/aa/widening/uniworld/webclub/rs/optical.htm
The mind forms shapes that don't exist
http://psycharts.com/opt_illus.html
Parallel Lines?
http://psycharts.com/opt_illus.html
Embedded Images
http://psycharts.com/opt_illus.html
http://psycharts.com/opt_illus.html
2 dimensional chalk drawing
http://psycharts.com/opt_illus.html
After a Necker cube is perceived from one
perspective, it naturally tends to change to the
other in about 3 seconds.
• When you look at the
top figure, your visual
system will organize
the elements into a
box. The box will
reverse, as in the
Necker Cube illusion.
The elements in the
bottom figure have
terminations and do
not readily group into
a box figure that
shows reversals
http://dragon.uml.edu/psych/box_1.htm
l
How fast do you switch?
http://psycharts.com/opt_illus.html
You will see it flip into a
second staircase
• M.C. Escherused
complex variations on
this illusion to achieve
some wonderful effects
like showing
representations of
people walking in
opposite directions,
both descending. He
also joined staircases
into an appearance of
infinite ascent/descent.
http://dragon.uml.edu/psych/stair.html
M.C. Escher
The shades of red are identical
The difference in the appearance is related to the
influence of the backgrounds.
http://psycharts.com/opt_illus.html
Compare the shades of red…
http://psycharts.com/opt_illus.html
When you lookat the figure you will see eithera
vase ortwo faces. If you continue to look, the
figure will appearto shift to the alternative
organization
Old Woman or Young Girl?
http://psycharts.com/opt_illus.html
Man/Woman
http://psycharts.com/opt_illus.html
Shimmer
http://psycharts.com/opt_illus.html
Any movement you see is an illusion!
http://psycharts.com/opt_illus.html
http://psycharts.com/opt_illus.html
Straight Lines?
http://psycharts.com/opt_illus.html
http://www.at-bristol.org.uk/Optical/Hermann_main.htm
Hermann Grid
Impossible Triangle
and Trident
http://psycharts.com/opt_illus.html
What is wrong with this sign?
http://www.keele.ac.uk/depts/aa/widening/uniworld/webclub/rs/optical.htm
One more…
Perspective is evoked in
this image by the pattern,
and the lines on the wall
which converge on to a
common point in the
distance.
http://www.sapdesignguild.org/resources/optical_illusions/perspective.html &
http://www.killsometime.com/illusions/Optical-Illusion.asp?Illusion-ID=36
THE END