Chapter 9 Flashcards
In order to distinguish between wavelengths independent of light intensity, one must have at least ______visual pigment(s).
two
Which of the following is behavioral support for the “opponent-process theory”?
color afterimages
Uchikawa et al. demonstrated how _________ can explain why color constancy occurs.
chromatic adaptation
By changing _______, we can create about a million (or more) discriminable colors.
saturation, intensity, and wavelength
Two stimuli that are physically different, but are perceptually identical, are called
metamers
The trichromatic theory of color vision is also known as the _________ theory.
Young-Helmholtz
Researcher Dorthea Jameson is quoted in the text as saying “A blue bird would not be mistaken for a goldfinch if it were brought indoors.” This supports the concept of
color constancy
Cerebral achromatopsia is when a person
has normal cone functioning, but can not experience color due to a brain injury
Which of the following was NOT an opponent mechanism proposed by Hering?
Blue (+); Green (-)
Blue and yellow paints mixed together yield
green
When light is mixed it is referred to as _______
an additive color mixture
The trichromatic theory of color vision states that color perception is due to
the pattern of activity in three different receptors
Adding more white to a color changes the color’s
saturation
Physiological evidence shows that deuteranopes do not have the _____ wavelength cone pigment.
long
Which of the following is phenomenological support for the “opponent-process theory” of color vision?
color afterimages, visualizing color combinations, simultaneous color contrast
The major theories of color vision were first proposed
in the 1800s, based on behavioral evidence only
The maximum absorption for the long-wavelength cone pigment is at ____ nm.
531
The reflectance curve for a purple piece of paper would
reflect long and short wavelengths
The neutral point for protonopes is approximately ___ nm.
492
A monkey with good color vision
would have a better chance of surviving than a color-blind monkey
The reflectance curve for a white piece of paper would
reflect long, medium and short wavelengths equally
Newton’s quote of “The Rays …are not colored” means that
colors are created by our perceptual system
Cerebral achromatopsia is when a person
has normal cone functioning, but can not experience color due to a brain injury
The reflectance curve is a plot of the light reflected off a surface as a function of
wavelength
If you look at a folded index card though a pinhole, you see the border as a(n) ________ because the card looks _______.
reflectance edge; flat
A monochromat experiences
black, white, and grays
Which of the following statements is TRUE about dichromatism?
Males are more likely to be dichromats than females
Ikya looks at a white surface under sunlight conditions and she perceives it to be white. When she looks at the white surface under a tungsten light, it looks ______ to her.
white
Which of the following is a finding that demonstrates the phenomenon of memory color?
Participants perceive a 620-nm pattern as being “redder” if that pattern has the shape of a stop sign rather than a mushroom shape
