Post on 10-Aug-2020
Optical IllusionsRusk• Psychology
Perception
Size constancy: ability to remember the size of an object no matter where it is located
Color constancy: ability to perceive an object as the same color regardless of the environment
Shape constancy: ability to perceive an object as having the same shape regardless of the angle
Space constancy: ability to judge distance by perceiving either self or object movement
Perceptual constancies use memory to maintain order in the world.
Perceptual Organization
Gestalt: making incomplete organization whole (they way something should be rather than how it actually is)
Similarity: grouping like things together
Proximity: grouping things together that are near each other
Closure: filling in the missing details
Principles of Organization
Closure Proximity
Similarity
Perceptual Organization
Perceptual Illusions
Franz Müller-Lyer designed this illusion in 1889.
Illusions are misperceptions. They illustrate how we organize objects into meaningful perceptions .
Which line is longer?
Muller-Lyer Illusion at Work
The Vertical-Horizontal Illusion
Are the two lines the same length?
In the figure-ground illusion, the figure is in the front while the ground is in the back. Do you see the faces facing one another or do you see the vase?
Figure-Ground Illusion
Click the forward arrow to move the cylinder on the right forward to the middle cylinder.
Which cylinder is largest?
Which cylinder is largest?
Which cylinder is largest?
For the next Illusion, pair up and have one partner write down the words as the other partner says them.
This picture is ambiguous in three ways:
• As a small cube in front of a larger cube; • As a large cube with a corner cubelet cut
out; • As a small cube inside three
perpendicular adjoining planes.
Stare at the central dot, and move your head forwards and backwards.