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UNIT 4

UNIT 4. SENSATION AND PERCEPTION. Housekeeping. Check Unit 7 Project Grades Be mindful of the deadline on the Unit 9 project. The Doorway to Psychology. TERMS YOU SHOULD KNOW Sensation Perception Transduction. The Doorway to Psychology. ABSOLUTE THRESHOLD

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UNIT 4

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  1. UNIT 4 SENSATION AND PERCEPTION

  2. Housekeeping Check Unit 7 Project Grades Be mindful of the deadline on the Unit 9 project

  3. The Doorway to Psychology • TERMS YOU SHOULD KNOW • Sensation • Perception • Transduction

  4. The Doorway to Psychology • ABSOLUTE THRESHOLD • minimal intensity needed to just barely detect a stimulus • JUST NOTICEABLE DIFFERENCE • Weber’s Law (constant proportion) • SENSORY ADAPTATION

  5. Vision • Sensing light • Properties of light waves • length • amplitude • purity

  6. The Human Eye • Cornea • Pupil • Retina • Accommodation • Cones • Rods • Fovea • Optic nerve

  7. Visual Pathways in the Brain • Visual streams • Ventral (below) stream • across occipital lobe into lower levels of temporal lobes (shape and identity) • Dorsal (above) stream • travels up from occipital lobe to parietal lobes (location and motion)

  8. Sensing Sound • Three physical dimensions of sound • frequency • amplitude • complexity • These determine what we hear • pitch • loudness • timbre

  9. The Human Ear

  10. Touch • Haptic perception • Thermoreceptors • Neural representation of the body’s surface • contralateral organization • somatosensory representation (fingers vs. back)

  11. Smell • Only sense directly connected to forebrain • Olfactory receptor neurons (ORNs) • Olfactory bulb

  12. Taste • Identifying things that are “bad” for you • Taste buds (5 different types) • salt • sour • bitter • sweet • umami (savory) • each contains several types of taste receptors (microvilli) that react with tastant molecules in food

  13. Additional Questions??

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