PERCEPTION How we process mental images.

MONOCULAR DEPTH CUES Relative Clarity

Distant objects appear less clear than they are. Moisture exaggerates depth.

Linear Perspective Parallel lines seem to come

together in the distance.

"Whilst part of what we perceive comes

through our senses from the object before

us, another part always comes out of

our own mind." -- William James

PERCEPTUAL CONSTANCY Perceiving that the size, shape, and

lightness of an object as unchanging even as the image on the retina of the eye changes.

SIZE CONSTANCY When an object comes nearer, our brain

understands that it’s not getting bigger even if it appears to.

Which is bigger?

http://psych.hanover.edu/krantz/sizeconstancy/Sizeconstancy.html

SHAPE CONSTANCY Even if the angle in which we are

looking things changes we don’t see the object in a different shape.

LIGHTNESS CONSTANCY When the light around the object

changes the objects apparent color changes but it’s actual color doesn’t.

PERCEPTUAL SET Mental predisposition to perceive

something one way and not the other.

EXPECTATIONS

MYSTERY SPOT

BIBLIOGRAPHY IllusionWorks http://psylux.psych.tu-dresden.de/i1/kaw

/diverses%20Material/www.illusionworks.com/html/hall_of_illusions.html

Roger Shepard (1990). Mind Sights: Original Visual Illusions, Ambiguities, and Other Anomalies. San Francisco: W. H. Freeman.