Exam 2

Question 1

which of the following lists the steps in color perception in the correct order?

Answer 1

1. Detection (able to sense light)
2. Discrimination (able to differentiate them)
3. Appearance (assign perceived colors to different objects in the world and assume such colors are stable)

Question 2

when looking at a blue sky during the day, ___ photoreceptors are most active, while looking at a red sky during sunset ___ photoreceptors ar most active.

Answer 2

Blue sky- S cones
Red sky- L cones

Question 3

Color vision is best during what type of lighting condition?

Answer 3

brighter light

Question 4

The principle of univariance refers to the fact that:

Answer 4

an infinite set of different wavelength-intensity combinations can elicit exactly the same response from a single type of photoreceptor

Question 5

what type of color-blindness refers to the fact that:

Answer 5

scotopic conditions

Question 6

according to the Young-Helmholtz theory, color vision can be understood best as:

Answer 6

mixing colors along 3 variables (S,M,L) that can give us the rest of the color spectrum

Question 7

RGB televisions and computer monitors have red, green, and blue pixels. Why dont they have yellow pixels?

Answer 7

red and green is a meatier for yellow, so the red and green pixels can be lighted up together to cause the yellow perception

Question 8

mixing paints to create new colors is an example of ___ color mixing, while shining lights to create new colors is an example of ___ color mixing.

Answer 8

Subtractive, additive

Question 9

in HSB (hue, saturation, brightness) color space, how does red differ from pink?

Answer 9

red and pink are differentiated by their saturation and brightness levels

Question 10

which of the following are pieces of evidence for color opponency?

Answer 10

negative afterimage

Question 11

in the hue cancellation experiments described in the textbook, if the starting color were too reddish, you would add ___ to cancel that redness.

Answer 11

green

Question 12

a single opponent cell in the LGN is shown to have a (a color) center and a (color 2)-surround. What would the wavelength codes be for the center and for the surround?

Answer 12

Green center and red surround=M center and L surround

Question 13

Color assimilation occurs when:

Answer 13

Colors “bleed” into each other, each taking on some of the chromatic quality of the other

Question 14

what piece of evidence suggests that color opponent processing occurs

Answer 14

the inability to see both halves of the pairs at once

Question 15

What is one potential explanation for why some people on the internet perceived
“The Dress” as blue and black, while others perceived it as white and gold?

Answer 15

our assumptions about how the Dress was illuminated (depends on your mental reference)

Question 16

which of the following shows evidence that color vision can impact other senses as well?

Answer 16

synesthesia

Question 17

what wavelength of light would produce no response from an S cone, a moderate response from a M cone and a large response from an L cone?

Answer 17

orange

Question 18

this heuristic results in both color constancy effects and the perception of depth.

Answer 18

shadow