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Understanding Sensation and Perception: A Deep Dive into Human Senses

This comprehensive overview explores the essential concepts of sensation and perception in psychology. Key topics include absolute thresholds, just noticeable differences, and sensory adaptation. We delve into the properties of light and sound, the structure and function of the human eye and ear, and the mechanisms of touch, smell, and taste. Gain insight into how our brains process sensory information through visual and auditory pathways, and discover how these elements contribute to our understanding of the environment. Perfect for psychology students and enthusiasts alike!

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Understanding Sensation and Perception: A Deep Dive into Human Senses

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Presentation Transcript

  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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