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Sensation and Perception

Sensation and Perception. CYPA PSYCH Spring 2014 Class 5 Mar 16. What’s the Difference?. Sensation. Perception. T he process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events. .

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Sensation and Perception

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  1. Sensation and Perception CYPA PSYCH Spring 2014 Class 5 Mar 16

  2. What’s the Difference? Sensation Perception The process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events. • The process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.

  3. Two Ways of Processing Bottom-up Processing Top-down Processing Guided by higher level mental processing, as we construct perceptions drawing on experience and expectation. • Sensory analysis that starts at the entry level (sensory receptors) and moves to the brain

  4. Thresholds of Sensation Absolute Difference The minimum difference between two stimuli required for detection 50% of the time. Just Noticeable Difference (JND) Weber’s Law: to be perceived as different, two stimuli must differ by a constant minimum percentage. Light: 8% Weight: 2% Tones: .3% • The minimum simulation needed to detect a particular stimulus 50% of the time • it depends on • Experience • Expectation • Motivation • Fatigue

  5. What about subliminal perception?

  6. Our Senses Vision Hearing Taste Touch Smell

  7. Vision

  8. Vision starts here…

  9. And then goes here…

  10. And then this happens

  11. How cool is this?

  12. Which turns into visual information processing…

  13. “A tomato’s color is a product of our mental processing.”

  14. Hearing

  15. The ear (outer, middle, inner)

  16. Hearing Loss and Deaf Culture

  17. Imagine… A life without (physical) pain…

  18. Perceptual Organization

  19. Depth Perception Binocular Monocular Depth cues, such as interposition and linear perspective, available to either eye alone. Relative height Relative size Interposition Linear perspective Light and shadow Relative motion • Depth cues, such as retinal disparity, that depend on the use of two eyes • By comparing images from the retinas in the two eyes, the brain computes distance; the greater the disparity between the two images, the closer the object. • Floating finger sausage!

  20. Perceptual Constancy

  21. Perceptual Set A mental predisposition to perceive one thing and not another Influenced by: Context (gender and race stereotypes) Emotion

  22. Sensory Abnormalities Prosopagnosia Synesthesia

  23. ESP Real or Not?

  24. Homework! On Blog: Guiding Question Response On Blog: Interest Article and Précis Set up a time to meet with me! Review Quizlet Read Chapter 3 (consciousness)

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