PSYC 230 EXAM 2 UPDATED ACTUAL
Questions and CORRECT Answers
Three steps to color perception - CORRECT ANSWER -detection, discrimination,
appearance
detection - CORRECT ANSWER -wavelengths of light must be detected
discrimination - CORRECT ANSWER -we must be able to tell the difference between
wavelengths
appearance - CORRECT ANSWER -assigning wave lengths and letting them stay that
way over time
Cone types of photoreceptors - CORRECT ANSWER -S, M, L (short, medium, long)
photopic - CORRECT ANSWER -bright enough to stimulate the cone receptors and to
saturate the rod receptors
scotopic - CORRECT ANSWER -bright enough to stimulate the cone but too dim to
saturate rods
The problem of univariance - CORRECT ANSWER -An infinite set of combinations can
get the same response from a single type of photoreceptor. One type of photoreceptor cannot
make color discriminations based on wavelength
trichromacy - CORRECT ANSWER -the color of any light is defined in our visual system
by the relationships of three numbers, the outputs of three receptor types now known to be the
three cones
, cone-opponent cell - CORRECT ANSWER -neuron whose output is based on a difference
between sets of cones.
color space - CORRECT ANSWER -three-dimensional space that describes all colors.
RGB color space - CORRECT ANSWER -Defined by the outputs of short, medium, and
long wavelength lights
HSB color space - CORRECT ANSWER -hue, saturation, brightness
opponent color theory - CORRECT ANSWER -perception of color is based on the output
of three mechanisms, each of them based on an opponency between two colors
Ewald Hering - CORRECT ANSWER -legal/illegal color combinations. cannot have
bluish yellow or reddish green.
unique hue - CORRECT ANSWER -Any of four colors that can be described with only a
single color term: Red, yellow, green, blue
achromatopsia - CORRECT ANSWER -An inability to perceive colors; caused by damage
to the central nervous system
Afterimage/ Negative afterimage - CORRECT ANSWER -A visual image seen after a
stimulus has been removed. Negative is that it is the opposite.
Deuteranope - CORRECT ANSWER -absence of M cones
Protanope - CORRECT ANSWER -absence of L cones
Questions and CORRECT Answers
Three steps to color perception - CORRECT ANSWER -detection, discrimination,
appearance
detection - CORRECT ANSWER -wavelengths of light must be detected
discrimination - CORRECT ANSWER -we must be able to tell the difference between
wavelengths
appearance - CORRECT ANSWER -assigning wave lengths and letting them stay that
way over time
Cone types of photoreceptors - CORRECT ANSWER -S, M, L (short, medium, long)
photopic - CORRECT ANSWER -bright enough to stimulate the cone receptors and to
saturate the rod receptors
scotopic - CORRECT ANSWER -bright enough to stimulate the cone but too dim to
saturate rods
The problem of univariance - CORRECT ANSWER -An infinite set of combinations can
get the same response from a single type of photoreceptor. One type of photoreceptor cannot
make color discriminations based on wavelength
trichromacy - CORRECT ANSWER -the color of any light is defined in our visual system
by the relationships of three numbers, the outputs of three receptor types now known to be the
three cones
, cone-opponent cell - CORRECT ANSWER -neuron whose output is based on a difference
between sets of cones.
color space - CORRECT ANSWER -three-dimensional space that describes all colors.
RGB color space - CORRECT ANSWER -Defined by the outputs of short, medium, and
long wavelength lights
HSB color space - CORRECT ANSWER -hue, saturation, brightness
opponent color theory - CORRECT ANSWER -perception of color is based on the output
of three mechanisms, each of them based on an opponency between two colors
Ewald Hering - CORRECT ANSWER -legal/illegal color combinations. cannot have
bluish yellow or reddish green.
unique hue - CORRECT ANSWER -Any of four colors that can be described with only a
single color term: Red, yellow, green, blue
achromatopsia - CORRECT ANSWER -An inability to perceive colors; caused by damage
to the central nervous system
Afterimage/ Negative afterimage - CORRECT ANSWER -A visual image seen after a
stimulus has been removed. Negative is that it is the opposite.
Deuteranope - CORRECT ANSWER -absence of M cones
Protanope - CORRECT ANSWER -absence of L cones
