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Psychology 3215 Questions about Vision to Ponder before Test 3 |
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2. What are spectral colors? What are nonspectral colors? Are nonspectral colors an illusion or are they real? What are metamers? 3. Is white a color? Is white a wavelength? Is purple a color? Is purple a wavelength? Is yellow a color? Is yellow a wavelength? 4. What is the difference between hue, saturation, and brightness? What is the difference between hue and color? How many colors can we see? 5. Understand
how additive and subtractive color mixing work in daily life.
Explain how to make a T-shirt look purple, using additive and
subtractive color mixing. 6. Where do we encounter additive and subtractive color mixing in daily life? 7. Understand trichromatic theory. What did Helmholtz do? What did he find? 8. Understand opponent process theory. What did Hering consider to be important evidence supporting his objections to trichromatic theory? 9. How did Hering's hypothetical color receptors work? 10. Whose theory was correct, Helmholtz or Hering? 11. Know the
general location and shape of the spectral sensitivity curves
for the three types of cone receptors in humans. 12. Why do we label the cones as Short, Medium, & Long wavelength detectors instead of Blue, Green, and Red detectors? 13. At the
level of activity of the cones, how do we explain seeing white,
blue, purple, yellow, and green? (Draw it, like we did in
class.) 14. What is
the difference between a Trichromat and a Dichromat? 15. What causes dichromat color blindness? Identify the three types of color blindness. What is the physiological problem? 16. What happens to the color world of individuals with each type of color blindness? What colors do they see, relative to people with standard color vision? 17. What is a binocular depth cue? A monocular depth cue? How can you tell the difference between a binocular depth cue and a monocular depth cue? 18. Be able to identify the difference between corresponding and noncorresponding retinal points in looking at a scene. What conditions produce each? 19. What is the horopter? Where is the horopter located in space? What is special about the retinal images of objects that are on the horopter? What is Panum's Area? 20. Diagram two objects, one of which is in front of the horopter and another object that is beyond the horopter, and indicate where their retinal images will be located. Understand the difference between crossed and uncrossed disparity. 21. Imagine
that you are sitting in your apartment and you look at various
people/objects. Explain how retinal disparity changes as you
look about the room. How do those changes contribute to
your understanding of spatial relationships? 22. What is
the size-distance issue with monocular depth cues? 23. How does
"linear perspective" work? How can artists use linear
perspective to both produce and mock 3D effects? 24. What are
examples of monocular depth cues? How/why do the monocular depth
cues work? 25. Be able to
examine a picture and identify monocular depth cues.
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