Lecture 5 - Depth Perception

Question 1

What are the cues for depth perception?

Answer 1

Oculomotor
Monocular
Binocular

Question 2

What is stereopsis?

Answer 2

The perception of depth as a result of retinal disparity

Question 3

What is depth perception like in other species?

Answer 3

• Most animals use same range of depth cues as humans do
• Frontal eyes are needed to binocular disparity
• Lateral eyes result in a reduction in or complete lack of overlap in the field of view from each eye

Question 4

What are monocular depth cues?

Answer 4

Cues are provided to each eye independently. Reflect top-down processing.

Question 5

What are the two types of monocular depth cues?

Answer 5

• Pictorial cues
• Movement based cues

Question 6

What is occlusion?

Answer 6

A type of pictorial clue - when an object partially hides another object, the one that is occluded is perceived to be further away.

Question 7

What is atmospheric perspective?

Answer 7

The farther away an object, the more air and particles (e.g., dust, water droplets, airborne pollution) are between us and the object making it appear less sharp.

Question 8

What is a type of movement based cue?

Answer 8

Motion parallax

Question 9

What are visual angles?

Answer 9

• Visual angles represent the size of the image projected onto the retina
• This depends on both the size of the stimulus and the distance from us
• As objects move closer to us the visual angle and size of the image on the retina increases

Question 10

Who studied size perception?

Answer 10

Holway and Boring§

Question 11

What is the size-distance scaling equation?

Answer 11

S = K(R X D)
S - Perceived size
R - Retinal image size
D - Perceived distance