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psych U4M18


what are the two things that determine the sensory experience of light wavelength and intensity (brightness/loudness)
cornea protects the eye
pupil/iris controls the amount of light that comes in
lens focuses light on retina
accomdation the process where the eye's lens changes shape to focus near or far objects on the retina
retina contains receptor cells (rods and cones) and other neural cells (transduction!)
photoreceptors sensory neurons that convert light into signals.
rods receptors that detect the brightness of light (used for night vision and picks up on white and black colors)
Cones functions in daylight; Color
fovea has the highest acuity in the retina
why do we have a blind spot unlike the cones, which can transmit messages through connected pathways, rods have no direct connection and when the ganglion cell leaves the eye to carry info to the brain, there are no receptor cells
bipolar cells (between optic nerve and row of rods and cones) They transit signals from rods and cones to the ganglion cells
another name for optic nerve ganglion cell
optic chiasm some fibers of the optic nerve cross over to the other side of the brain.
feature detectors Nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, mvmt
parallel processing the brain processing the many aspects of a problem simultaneously
how does parallel processing analyze a visual scene it divides the scene into motion, form, depth, and color and works on each aspect simultaneously. Then they are all integrated.
trichromatic theory the retina has 3 different color receptors which are most sensitive to red, green, and blue, which can produce any color (young-hemholtz theory)
opponent process theory opposing retinal processes, which are red-green and yellow-blue, enable color vision
color blindness the inability to distinguish color
how does color vision work in each opposing retinal process, either one color is "on" and the other is "off". that's why we can combine red and blue but not red and green
if we see smaller and wider waves that means the color is... duller, less bright
light in the light spectrum is converted into... electromagnetic energy
bipolar cells specialized neurons connected to photoreceptors
ganglion cells are connected to bipolar cells. the axons join together to form the optic nerve
optic nerve carries neural impulses from the eye to the brain
hue wavelengths/colors
saturation vividness of a color
brightness strength of the light
if the wavelength has a higher amplitude... the color is brighter
afterimage the complimentary color
young-hemholtz theory cones are activated by light waves of blue, red, and green
what does the trichromatic theory explain you can see all colors by mixing the three; explains colors and color blindness
opponent process theory cells operate antagonistically
what are the three pathways of the opponent process theory black/white, red/green, blue/yellow
what does the opponent process theory explain explains afterimage effect
dichromats people who cannot distinguish between the antagonizing colors
monochromats people who see only in shades of black and white (ones don't work)
what are normal color seeing people called trichromats
Created by: allyson.lee
Popular Psychology sets




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