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Sensation and Perception

Sensation and Perception. How does your mind trick you?. How does selective attention effect you?. Focusing attention on one aspect of our experience Focusing on good looks and ignoring personality The gorilla on the basketball court. How does figure & ground effect you?.

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Sensation and Perception

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  1. Sensation and Perception How does your mind trick you?

  2. How does selective attention effect you? • Focusing attention on one aspect of our experience • Focusing on good looks and ignoring personality • The gorilla on the basketball court

  3. How does figure & ground effect you? • Figure = Foreground - what we focus on • Ground = Background • What do you see?

  4. What do you see?

  5. How your mind organizes information for you by grouping • Proximity • Similarity • Continuity • Connectedness • Closure • Seeing complete letters on a sign even though some bulbs are burned out.

  6. Depth perception • Visual cliff • Infants will stop at the “cliff” • The ability to perceive depth is at least partially innate.

  7. Do you remember? • How does selective attention relate to the figure and ground effect? • What are the four ways your mind groups information to help make sense of it? • What is the visual cliff? What does it tell us about depth perception?

  8. How does your brain organize your perceptions? • Gestalt psychologists • The whole is more than the sum of its parts

  9. How does your brain create perceptual illusions?

  10. How does your brain use linear perspective? • Parallel lines converge • E.g. Railroad tracks

  11. Why do we see motion when none is there? • The perception of motion • Phi phenomenon • Apparent movement of stationary lights • Las Vegas marquees • Stroboscopic movement • Cartoon book flip pages • Movies

  12. Which is larger?

  13. How do your eyes trick you with perceptual consistency? • Ponzo Illusion • A bar further away appears larger even if the same size on our retinas.

  14. Do both your eyes see the same thing? • Retinal Disparity • Floating finger illusion

  15. Do you see what is actually there? • Muller-Lyer Illusion • Misperception of length of lines

  16. Do you remember? • What is the Gestalt perspective? • What are some examples of linear perspective? • What two things help you see movement when none exists? • What is the ponzo illusion? • What is retinal disparity? Can you give a demonstration of it?

  17. Do your beliefs effect what you see? • Perceptual set • How do our beliefs affect our perception? • Definition of the situation • We often perceive what we expect to see • Our mental predisposition influences what we perceive

  18. How does the context effect what you see? • What you see is affected by the context in which you saw it.

  19. Human factor psychologists • How can we organize machines to fit our natural perceptions? • How could this natural map be made even better?

  20. Human factor psychologists: Designing flight instrument displays for pilots

  21. Extrasensory perception • Telepathy • Mind-to-mind communication • Clairvoyance • Perceiving remote events • Precognition • Perceiving future events • Psychokinesis • Mind over matter • E.g. bending a spoon or raising a table

  22. Who has ESP? • There is no reliable evidence that anyone possesses ESP.

  23. Do you remember? • What is the Muller-Lyer illusion? • What is perceptual set? How does it effect what we perceive? • What is the context effect? Can you give an example? • What is an example of something human factor psychologists would study? • Why might a police department not want to use a person with ESP to solve a crime?

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