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LEC 11- I/O devices - Coggle Diagram

- - - - problems
        
        hand away from keyboard
        
        user has to pick up the pen/stylus
        
        hand obscures screen
        
        palm rejection for touch
        
        fatigue(if screen is upright)
        
        loosing stylus
      - No translation needed- directly controls the cursor
    - - hand eye coord
      - might need to swtich betw keyboard and pointing device
      - control cursor
    - - perceived affordance
      - Actual affordance
    - - predict time taken to reach target using pointing device
  - - - speech
      - beeps, warning sounds
    - - leg/ lights- that indicate status of system
    - - Screens-visual display
      - printers
  - - - grasped and rolled with hand, constrained movement in horizontal plane.. one or more buttons, analog
      - good for panning
    - - common for data entry
    - - setting direction of movement in virtual space, continuous zooming
      - grasped with hand, pushed or twisted, one ore more buttons, constrained movement in 3D, analog
    - - grasped with hand and positioned over screen
      - pointing actions- pointing, selecting, dragging objects on screen
    - - voice commands
      - user's voice
    - - tracking of finger/hand/body position in 3D
    - - camera based tracing- eye tracking
      - finger print iris
      - pen- graphics, gestures
      - speech voice- common home devices, voice assisted phones
        
        problems with accent, continuous speech, rapid speech, whispeing
        
        misunderstood
        
        users may loose patience
      - handwriting-
      - HAPTIC feedback
        
        vibration
        
        3D touch- force, motion