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Human Interaction

This comprehensive overview explores how humans acquire and express information through various sensory modalities including vision, audio, touch, and more. Discover the intricate mechanisms of perception, such as the roles of the retina, macula, and auditory ranges, as well as the importance of saccades and peripheral vision. Learn about the nuances of communication methods like speech, keyboard use, and non-verbal cues. This guide highlights the efficiency and limitations of each mode of interaction, emphasizing human cognitive functions and sensory processing.

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Human Interaction

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  1. Human Interaction

  2. How do people get information? • Vision • 55MB/sec • Audio • 64 KB/sec • Touch • 400 B/sec • Taste • Lower

  3. How do people express information? • Audio • Speech • Muscle movement • Dexterity • Muscle Memory

  4. Vision

  5. Retina Lens Iris

  6. Retina Iris

  7. Retina – 64 levels 6 bits Iris

  8. Periphery Macula/Fovea

  9. Rods (gray) Cones (color)

  10. 20 Rods / 1 Cone Rods (gray) Cones (Red 64% Green 33% Blue 3%)

  11. 20 Rods / 1 Cone Rods (gray) Cones (Red 64% Green 33% Blue 3%)

  12. Saccade = 200 msecs 5 / sec

  13. Nature of the Macula • Get a section of text • Focus on one word • Try to read surrounding words • WITHOUT MOVING YOUR EYES

  14. Periphery/Macula • Macula • Careful close study • Very slow • Small window • 5 times / second • Color • Periphery • Gray and blurry • Fast targeting • If you must find things by reading and study • Macula / Saccade • Very Slow • If you can find things with the periphery • Gray, Blurry • Very Fast

  15. Retina Lens Periphery Macula/Fovea Iris

  16. Buy play tickets (tasks) • What shows are playing? • What shows are available near where I live? • What do they cost?

  17. 3D Perception • Occlusion • Retinal Disparity • Kinetic Depth effect

  18. Audio • Human hearing • 20Hz to 18Khz • Best hearing • 1Khz to 5Khz • Speech • 500 Hz to 3Khz

  19. Why use audio? • Attention • Eyes free • Form factor • Energy • Express what you cannot currently see

  20. Touch/Tactile • Vibration and skin deformation • Hairy skin • Vibration sensors at the base of each hair • Glabrous skin • No hair • Ridges with vibration sensors • Vibration up to 400 Hz • 2mm spatial resolution on fingers • Temperature • Heat dissipation • Pain

  21. Human Expression • Audio • Keyboard • Pointing • Object movement

  22. Audio • Speech • 125-150 Words per minute • Reference the unseen • Association with shared experience • Ambiguity • Recognition accuracy • Privacy • Non speech

  23. Keyboard • 50-70 Words per minute • Ideographic Languages

  24. Pointing • Human movement • Muscle size / body part mass • Speed of movement • Fatigue

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