Outline 10/27/98

Perception

Perceptual Constancy

Across movement, shape, & size

Visual Illusions & Depth Percepetion

Perceptual Constancy

Sensations (i.e., the data) change, but perceptions remain the same. Three examples:

With head movement

 

Shape constancy

 

Size constancy

 

 

Perceptual Illusions: Experience Gone Awry

 

 

Depth Perception: The Müller-Lyer Illusion

 

 

Retinal Size and Depth Perception

Color Afterimage One More Time!

 

 

For the moon illusion remember:

Retinal size is constant.

Apparent size changes as a function of perceived distance (i.e., depth cues).

On the horizon, depth cues suggest the moon is further away than when the moon is high in the sky.

If retinal size is constant, but depth cues suggest further away, brain concludes the moon must be bigger.