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Transduction
Transformation of stimulus energy into a neural impulse.
Brightness
Intensity determined by amplitude, related to perceived brightness.
Color
Dimension of color determined by length of wavelength of light.
Trichromatic Theory
Young-Helmholtz suggests that the retina (cones) contain 3 receptors sensitive to red, blue, and green.
Opponent Process Theory
Hering proposes that we process 4 primary colors opposed in pairs of red-green, blue-yellow, and black-white.
After Image
An image that remains after the stimulation to the retina has ended.
Color Blindness
Prevents the ability to discriminate between certain colors due to a weakness in one of the cones.
Inattentional Blindness
Failure to see objects in visual field when attention is directed elsewhere.
Change Blindness
Failure to notice changes over time in the environment.