8.2 Depth cues in perception

Question 0

For objects far away from us, which cue to me mostly rely on?

Answer 0

Monocular.

Question 1

What are the two depth cues?

Answer 1

Monocular (one eye) and binocular (both eyes).

Question 2

What are the two binocular depth cues?

Answer 2

Convergence and retinal display.

Question 3

What is convergence used to perceive?

Answer 3

The distance of objects at close range.

Question 4

When the eyes converge on a near object (turn inward as the object is brought closer), what does this change with the angle?

Answer 4

The angle between the eyes us greater on a closer object.

Question 5

It is from the stretching of the eye muscles to converge the eye that we can determine what?

Answer 5

The distance that the object is from us.

Question 6

Because the eyes are approx 6 apart, what does thus mean to the images that fall in the retina of both eyes?

Answer 6

The images are different.

Question 7

The closer the object is to us, is there a greater or less difference between the images on each eye?

Answer 7

The closer the object, the greater the difference on each eye.

Question 8

What are all 5 monocular depth cues?

Answer 8

• Motion parallax
• Texture gradient
• Linear perspective
• Superposition or interposition
• Height in plane or elevation

Question 9

Explain motion parallax?

Answer 9

Involves movement, movement of the head causes objects in the distance to move in same direction as head, and objects close move in opposite direction to us.
Objects close to us also move faster than those further away.
This means we can estimate how far away an object is.

Question 10

Explain texture gradient?

Answer 10

Close up, texted is coarser. Further away, texture is smoother.

Question 11

Explain linear perspective.

Answer 11

Parallel line that move away from us tend to converge. (Train track)

Question 12

Explain superposition or interposition?

Answer 12

Objects that are closer to us can obscure objects that are further away,

Question 13

Explain height in plane or elevation?

Answer 13

When an object is further away, it appears higher in our visual field.

Question 14

Explain motion parallax?

Answer 14

Involves movement, movement of the head causes objects in the distance to move in same direction as head, and objects close move in opposite direction to us.
Objects close to us also move faster than those further away.
This means we can estimate how far away an object is.

Question 15

Explain texture gradient?

Answer 15

Close up, texted is coarser. Further away, texture is smoother.

Question 16

Explain linear perspective.

Answer 16

Parallel line that move away from us tend to converge. (Train track)

Question 17

Explain superposition or interposition?

Answer 17

Objects that are closer to us can obscure objects that are further away,

Question 18

Explain height in plane or elevation?

Answer 18

When an object is further away, it appears higher in our visual field.

Question 19

What are the two perceptual constancies?

Answer 19

Size and shape constancy.

Question 20

Explain size constancy?

Answer 20

When you move closer to am object the retinal image becomes larger but the perceived size of the object remains constant. This is because the brain takes into account the change in distance.

Question 21

Explain shape constancy?

Answer 21

Our viewpoints might be different but we stuff perceive the shape as the same. E.g a door looks squished when it is ajar, but we still perceive it as the same shape. Different viewpoints of the same object do not stop us from recognising the object.