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Get Out Your Notebooks!

Get Out Your Notebooks!. Ted Talk: Optical Illusions – I think, I see, I wonder… Perception Continued!. Sense Perception. ‘Two thirds of what we see is behind our eyes.’ - Chinese Proverb. Perception is Complex. Sensation - material gathered from world

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Get Out Your Notebooks!

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  1. Get Out Your Notebooks! Ted Talk: Optical Illusions – I think, I see, I wonder… Perception Continued!

  2. Sense Perception ‘Two thirds of what we see is behind our eyes.’ - Chinese Proverb

  3. Perception is Complex Sensation - material gathered from world Interpretation - provided by our minds Selectivity The role of the unconscious Expectations

  4. Selectivity • You cannot process all of the sense data you are surrounded by • Your mind SELECTS which details to attend to. • Ex. Traffic outside, computer hum, a roach in the floor • How does the mind ‘decide’ what to be conscious of? • Intensity and contrast are two seemingly objective factors that may have evolutionary origin

  5. Subject Selectivity • Mood and Interest may affect selectivity • Ex. Three friends walking trails at Radnor Lake, an argument over music • If your family buys a new car, you will immediately start to notice every car in traffic that is similar • If a woman becomes pregnant, she will notice every pregnant woman

  6. Time-Out! Take one of the following phenomena and describe how it might be seen through the eyes of the following people: a. a child dying in poverty as seen by a doctor, an economist, a social worker, the child’s father. b. a sunset as seen by a religious figure, a physicist, a painter, a farmer c. a tree as seen by a biologist, a logger, an environmentalist, a native American.

  7. Optical Illusions How much of ‘seeing’ is done with our eyes? What is the difference between ‘seeing’ and ‘perceiving’? Knowledge Issue Concepts: Context, Expectations, Visual Grouping, Figure/Ground, Unconscious Activity

  8. Issue #1: Context The way we see something depends partly on the context in which we see it. Consider a man holding a bloody knife…how could context change our perception of what are eyes ‘see’?

  9. Issue #2: Expectations What we expect to see influences what we do see This perceptual error is far from uncommon Look at the image to the right…is there anything wrong?

  10. Issue #2: Expectations What cards do you see?

  11. Issue #3: Visual Grouping We have a natural tendency to look for meaning in what we see and to group our perceptual experiences together into shapes and patterns Shapes in clouds Man in the Moon

  12. Issue #4: Figure/Ground We tend to ‘highlight’ certain aspects of what we see (‘figure’) and treat the rest as background (‘ground’) Allows reading and other forms of focused attention

  13. Time-Out! We suffer not only from visual illusions, but also from illusions with each of our other senses. Can you give some examples of illusions with hearing, touch, taste, and smell?

  14. Issue #5: Role of the Unconscious Many interpretations we routinely make are on an unconscious level Ex. Image of someone approaching from down a hallway Ex. Our face in the mirror

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