Perception of Vision

Question 1

Color Perception

Answer 1

Wavelengths of light are physical, but our perception of color is purely psychological

Question 2

Hue

Answer 2

variations described by names such as red, purple, blue, orange, etc.

Question 3

Saturation

Answer 3

apparent purity, vividness, or richness

Question 4

Lightness

Answer 4

dark to light

Question 5

Trichromatic Theory

Answer 5

Theory proposes there are 3 types of photoreceptors, corresponding to blue, green, and red

Question 6

Color blindness

Answer 6

two types of cones and are entirely missing the function of the third (dichromats)
two types of cones that work normally, and one type that works more weakly

Question 7

Opponent Process Theory

Answer 7

Color perception is controlled by the activity of two opponent systems, only one color can be signaled at a time
Blue-yellow and red-green

Question 8

Visual Acuity

Answer 8

Represents the clearness or sharpness of vision

Question 9

Contrast Sensitivity

Answer 9

Represents the ability of the visual system to distinguish bright and dim components of a static image

Question 10

Perceptual Organization

Answer 10

Perceptual organization is the process by which we figure out the relationships among potentially separate stimulus elements (e.g., parts, features, dimensions)

Question 11

Figure and Ground

Answer 11

Figure is objects and Ground is background

Question 12

Proximity

Answer 12

elements close together are perceived as a group

Question 13

Similarity

Answer 13

similar elements (in terms of color, form, or orientation) are perceived together

Question 14

Continuity

Answer 14

points connected in straight or smoothly curving lines are perceived together

Question 15

Closure

Answer 15

open curves are perceived as complete forms

Question 16

Common fate

Answer 16

elements moving in the same direction at the same speed are perceived as together

Question 17

Common region

Answer 17

an explicit boundary

Question 18

Connectedness

Answer 18

explicit lines

Question 19

Depth Perception

Answer 19

Oculomotor depth cues

Monocular Depth Cues

Question 20

Proprioception

Answer 20

ability to feel what your muscles are doing and where your limbs are positioned

Question 21

Accomodation

Answer 21

automatic adjustments of the lens that maintain a focused image on the retina
Good for stimuli between 20cm and 3m

Question 22

Vergence

Answer 22

degree to which the eyes are turned inward to maintain fixation on an object
Good up to 6m

Question 23

Monocular Depth Cues

Answer 23

Convey impressions of depth in a still image

Question 24

Interposition

Answer 24

nearer objects will block the view of more distant objects if they are in the same line of vision

Question 25

Oculomotor depth cues

Answer 25

Provide info about depth from the muscles info from the eyes

Question 26

Size

Answer 26

the “bigness” of an object

Question 27

Perspective

Answer 27

angles such as when you know something is rectangular but it appears trapezoidal

Question 28

Motion Parallax

Answer 28

apparent displacement or difference in position of an object viewed along two different lines of sight

Question 29

Binocular disparity

Answer 29

each eye receives a slightly different image of the world because of the eye’s location

Question 30

Size and shape constancy

Answer 30

We tend to see objects as the same size despite how large the image on our retina