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Psychology Power Point Notes

Psychology Power Point Notes. PSY 101 Mr. Fetzner. 6.1 Introduction to Sensation and Perception. NLshop/ Fotolia.com. Table of Contents. Sensation and Perception Bottom-up Processing, Top-down Processing Psychophysics Thresholds Sensory Adaptation. 4 5 9 10-11 13. true. false.

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Psychology Power Point Notes

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  1. Psychology Power Point Notes PSY 101 Mr. Fetzner 6.1 Introduction to Sensation and Perception

  2. NLshop/ Fotolia.com Table of Contents Sensation and Perception Bottom-up Processing, Top-down Processing Psychophysics Thresholds Sensory Adaptation 4 5 9 10-11 13

  3. true false true Fact or Falsehood?

  4. Perception Sensation • How we make sense of the data • Data coming in Faces? Horses? • What did you SENSE on this slide? • What did you PERCEIVE on this slide? Rocks?

  5. Rich Reid/Getty Images Hemera/ Thinkstock Bottom-up Processing • Sensory receptors relay information to the brain • The brain interprets this information Top-down Processing • Previous experience and expectations affect the detection and analysis of information from the senses • Explains visual illusions • How is the child using bottom-up processing of sensory information?

  6. Hemera/ Thinkstock • How are you bottom-up processing AND top-down processing as you make sense of this figure? What areas of the brain and/or visual sensory system result in this illusion? In other words, what does this apparent “malfunction” in visual perception tell us about how our visual system operates? How might the processes which lead to this illusion be adaptive in normal, everyday situations?

  7. Barbara Penoyar/ Thinkstock • Exercise • Change the position of your watch, put a book on your lap, put your phone in a different pocket or put a pencil behind your ear. Thinkstock Comstock/ Thinkstock iStockphoto / Thinkstock

  8. Psychophysics Methods that measure the strength of a stimulus and the observer’s sensitivity to the stimulus AJPhoto / Photo Researchers, Inc. / Science Source

  9. liquidlibrary / Thinkstock Absolute Threshold Minimum stimulus necessary to detect a stimulus half of the time

  10. Difference Threshold (Just Noticeable Difference or JND) Minimal change in a stimulus that can just barely be detected Creatas / Thinkstock You’re a bit flat! • Weber’s Law: • For a difference to be perceptible, two stimuli must differ by a constant proportion, rather than amount

  11. Which red box is darker than the other two?

  12. Feel anything unusual? • Something you adjusted earlier? Sensory adaptation • Benefit—freedom to focus on informative changes without uninformative background stimulation • We perceive the world not as it actually is, but as it is useful for us to perceive it. Diminishing sensitivity to an unchanging stimulus Photo credits, clockwise from top left: Barbara Penoyar/ Thinkstock; Thinkstock; Comstock/ Thinkstock; iStockphoto/ Thinkstock

  13. What is the Difference Between Sensation and Perception? • Ouch! • I won’t do that again! Sensation iStockphoto / Thinkstock The detection of environmental stimuli, such as sounds, objects and smells Hemera/ Thinkstock Perception The experience of detecting those environmental stimuli—it refers to how our brains organize and interpret sounds, objects and smells.

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