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4. Perception

4. Perception. Lesson 1. Empiricism Common-sense realism Perceptual illusions. Perception. “awareness of things through our 5 senses”. Choose a sense to lose!. Choose a sense to lose!. Which sense did you choose? Why? Which sense is most identified with knowledge? Why?. Empiricism.

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4. Perception

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  1. 4. Perception

  2. Lesson 1 • Empiricism • Common-sense realism • Perceptual illusions

  3. Perception “awareness of things through our 5 senses”

  4. Choose a sense to lose!

  5. Choose a sense to lose! • Which sense did you choose? Why? • Which sense is most identified with knowledge? Why?

  6. Empiricism All knowledge is ultimately based on perceptual experience

  7. The subjects you study? Can you list the role perception plays in your different IB subjects? Are there any areas of knowledge where perception plays NO role?

  8. Common-sense realism Perception is passive and gives us an accurate picture of reality Do you think our senses give us an accurate picture of how the world really is?

  9. http://www.grand-illusions.com/opticalillusions/impossible_motion/http://www.grand-illusions.com/opticalillusions/impossible_motion/

  10. Perception is a complex process Sensation and interpretation

  11. Interpretation: Context

  12. Interpretation: Expectations

  13. Interpretation: Expectations • The following four slides will be shown very quickly. Try to remember what the four cards are.

  14. Can you name them?

  15. Can you name them?

  16. Illusions from other senses? Can you think of any illusions from our other senses?

  17. Perceptual illusions Pass the two blocks around. Which one is colder? Put ice cubes on the blocks and watch

  18. Perceptual illusions How did your sense of touch score?!

  19. Lesson 2 • Selectivity of perception • Seeing and believing • Distinguishing appearance from reality

  20. Selectivity of perception • Discuss in groups how the following picture would be interpreted through the eyes of a religious figure, a physicist, a painter or a farmer?

  21. Selectivity of perception • Discuss in groups how the following picture would be interpreted through the eyes of a biologist, logger, environmentalist, a native American?

  22. Selectivity of perception - emotion There’s someone for everyone.

  23. Seeing the world clearly? In what emotional state do we see the world clearest? Why?

  24. Selectivity of perception - education What do you see? What would a doctor see?

  25. Selectivity of perception - education What do you see? What would a musician see?

  26. Selectivity of perception - education What do you see? What would a dentist see?

  27. Selectivity of perception - education What do you taste? What would a wine expert taste?

  28. Seeing/believing • In the 19th century scientists believed there is a planet between Mercury and the sun. Some believed it so much they said they had seen it in their telescopes. No such planet exists.

  29. Seeing/believing

  30. Seeing/believing

  31. Seeing/believing

  32. Seeing/believing • YouTube - Godless Comedy from That Mitchell and Webb Look

  33. Eye witnesses • YouTube - Impossible eye witness funny sketch - A Bit of Stephen Fry & Hugh Laurie – BBC • YouTube - The Eyewitness Test: How do you stack up?

  34. Distinguishing appearance from reality How can we trust our senses?

  35. It looks like poo, it smells like poo. I’ll taste it just to make sure. Confirmation by another sense

  36. Coherence

  37. Independent testimony

  38. Lesson 3 • Extension of the senses • Ultimate reality • What is really out there? • Theories of reality • What should we believe?

  39. Extension of the senses

  40. Electromagnetic spectrum λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

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