Slides to accompany Sensation modules

1. Sensation & Perception
unit
m12-17

2. m12 - Introduction to
Sensation

3. Psychophysics beginnings
Top-down vs Bottom-Up
Processing

4. Absolute threshold
Signal detection

5. Absolute threshold
Signal detection

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. 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. Stairway to Heaven
“Oh here’s to my sweet Satan. The one whose
little path would make me sad, whose power is
Satan.”

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. Another One Bites the
Dust
“Another one bites the dust
Another one bites the dust
Another one bites the dust”

11. Another One Bites the
Dust
“Another one bites the dust
Another one bites the dust
Another one bites the dust”

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. Another One Bites the
Dust
“It’s fun to smoke marijuana
It’s fun to smoke marijuana
It’s fun to smoke marijuana”

14. “subliminal” associations

15. “subliminal” associations

16. “subliminal” associations

17. “subliminal” associations

18. “subliminal” associations

19. “subliminal” associations

20. Difference threshold (Just noticeable
difference)
Weber’s Law
Light must differ by 8%
Weight by 2%
Tone by 0.3%

21. Sensory adaptation
Sensory attention x
Cocktail party effect

22. What do you see?

23. Whato you see?
h do
W

24. Whato you see?
h do
W

25. m13 - Vision

26. Hue = wavelength
Intensity = amplitude

28. Normal Nearsighted Farsighted

30. Ganglion Cell Activity

31. Ganglion Cell Activity

32. Ganglion Cell Activity

34. Feature Detection Cells

35. Visual Processing

36. Visual Processing procedure

37. What do you see?

38. What do you see?

39. What do you see?

40. What do you see?

41. What do you see?

42. Color Vision
Young-Helmholtz
trichromatic theory
additive color
mixing

43. Color Vision
Opponent-Process Theory
after-image effects . . .

47. 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

48. Color Constancy

53. m14 - Hearing

54. Amplitude = volume
Frequency = pitch

55. Amplitude = volume
Frequency = pitch

57. Echolocation

58. Place Theory
Frequency Theory

59. Conduction Hearing Loss
Sensorineural Hearing Loss

60. m15 - Other Senses

61. Touch
Pressure, warmth, cold, and pain
• Only pressure has identifiable sensory
neurons
Pain is adaptive
• Hyperalgesia and Congenital Analgia
Phantom Limb
Gate Control Theory

62. Taste
• Sweet, sour, salty, bitter ...
and umami
• Super-tasters

64. Vestibular Sense vs Kinesthesis