Humans

• are facing loads
  • load types (ordered by how demanding they are):
    • cognitive
    • visual
    • motor
      • Fitt's law define how big objects on a screen should be
      • a relationship between speed, accuracy and distance between objects
      • it's good to minimize motor switching (mouse to keyboard and vice versa)
  • all loads are not considered even
  • mostly we want to reduce loads, but when there's a need for more focus, we should increase them
• create mental models
  • a collection of thought processes and memories about how something works
  • they drive behavior
    - Assume that you have at most 7 to 10 minutes of a person’s attention.
    If you must hold attention longer than 7 to 10 minutes, introduce novel information or a break