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Sensation Unit slides

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Sensation Unit slides

  1. 1. Sensation & Perception unit m12-17
  2. 2. m12 - Introduction to Sensation
  3. 3. Psychophysics beginnings Top-down vs Bottom-Up Processing
  4. 4. Absolute threshold Signal detection
  5. 5. Absolute threshold Signal detection
  6. 6. Stairway to Heaven “Yes there are two paths that you can go by, but in the long run there’s still time to change the road you’re on”
  7. 7. Stairway to Heaven “Yes there are two paths that you can go by, but in the long run there’s still time to change the road you’re on”
  8. 8. Stairway to Heaven “Oh here’s to my sweet Satan. The one whose little path would make me sad, whose power is Satan.”
  9. 9. Stairway to Heaven “Oh here’s to my sweet Satan. The one whose little path would make me sad, whose power is Satan.”
  10. 10. Another One Bites the Dust “Another one bites the dust Another one bites the dust Another one bites the dust”
  11. 11. Another One Bites the Dust “Another one bites the dust Another one bites the dust Another one bites the dust”
  12. 12. Another One Bites the Dust “It’s fun to smoke marijuana It’s fun to smoke marijuana It’s fun to smoke marijuana”
  13. 13. Another One Bites the Dust “It’s fun to smoke marijuana It’s fun to smoke marijuana It’s fun to smoke marijuana”
  14. 14. “subliminal” associations
  15. 15. “subliminal” associations
  16. 16. “subliminal” associations
  17. 17. “subliminal” associations
  18. 18. “subliminal” associations
  19. 19. “subliminal” associations
  20. 20. Difference threshold (Just noticeable difference) Weber’s Law Light must differ by 8% Weight by 2% Tone by 0.3%
  21. 21. Sensory adaptation Sensory attention x Cocktail party effect
  22. 22. What do you see?
  23. 23. Who What do you see?
  24. 24. Who What do you see?
  25. 25. m13 - Vision
  26. 26. Hue = wavelength Intensity = amplitude
  27. 27. Normal Nearsighted Farsighted
  28. 28. Ganglion Cell Activity
  29. 29. Ganglion Cell Activity
  30. 30. Ganglion Cell Activity
  31. 31. Feature Detection Cells
  32. 32. Visual Processing
  33. 33. Visual Processing procedure
  34. 34. What do you see?
  35. 35. What do you see?
  36. 36. What do you see?
  37. 37. What do you see?
  38. 38. What do you see?
  39. 39. Color Vision Young-Helmholtz trichromatic theory additive color mixing
  40. 40. Color Vision Opponent-Process Theory after-image effects . . .
  41. 41. Color processing seems to occur in two stages: Retinal cones respond like Young- Helmholtz trichromatic theory Signal processed via opponent-process in the central nervous system
  42. 42. Color Constancy
  43. 43. m14 - Hearing
  44. 44. Amplitude = volume Frequency = pitch
  45. 45. Amplitude = volume Frequency = pitch
  46. 46. Echolocation
  47. 47. Place Theory Frequency Theory
  48. 48. Conduction Hearing Loss Sensorineural Hearing Loss
  49. 49. m15 - Other Senses
  50. 50. Touch Pressure, warmth, cold, and pain Only pressure has identifiable sensory • neurons Pain is adaptive Hyperalgesia and Congenital Analgia • Phantom Limb Gate Control Theory
  51. 51. Taste Sweet, sour, salty, bitter ... • and umami Super-tasters •
  52. 52. Vestibular Sense vs Kinesthesis

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