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Sensation and perception

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Sensation and Perception part 1

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Sensation and perception

  1. 1. Sensation and Perception PSYCHOLOGY 1
  2. 2. Objectives -Understand the definition of sensation and perception; -Discuss concepts of threshold; -Explain signal detection theory and sensory adaptation; -Familiarize with sensory system; -Explain the movement of perception; -Determine between perceptual illusion and sound perception; -Discuss difference between olfactory and gustatory perception and -Understand special type of perception.
  3. 3. Definition In psychology, Sensation and Perception are stages of processing of the senses in human and animal systems, such as vision, auditory, vestibular, and pain senses.
  4. 4. Thresholds • A minimum amount of stimulation needed to start a neural impulse. • Divides the line between what energy can be detected or not. • Absolute Threshold and Difference Threshold
  5. 5. Absolute threshold for our Senses Senses Absolute Threshold Equivalent Vision Candle thirty miles away on a clear, dark night Hearing Tick of a watch twenty feet away in a quiet room Taste Teaspoons of sugar dissolved in two gallons of water Smell One drop of perfume in a three-room apartment Touch A bee’s wing falling on the cheek from a height of one centimeter Warmth or Cold A one to two degree celcius change in skin temperature
  6. 6. Signal-Detection Theory • Signal detection theory (SDT) is used when psychologists want to measure the way we make decisions under conditions of uncertainty, such as how we would perceive distances in foggy conditions.
  7. 7. Sensory Adaptation
  8. 8. Visual Sensation Sense of Sight
  9. 9. Auditory Sensation Sense of Hearing
  10. 10. Olfactory Sensation Sense of Smell
  11. 11. Gustatory Sensation Sense of Taste
  12. 12. Cutaneous or Skin Sensation Sense of Touch
  13. 13. Sense Organ Various Senses Receptor Cells Eyes Sight Rods and cones in the retina Ears Hearing Hair cells in the Organ of Corti Tongue Gustatory Taste cells in the taste buds Nose Olfactory Olfactory Epithelium cells Skin Pressure, pain, warmth, and cold Subcutaneous adipose tissues
  14. 14. The End

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