Scientific Approach (beyond user friendly)

• Specify users and tasks

• Predict and measure

  • time to learn
  • speed of performance
  • rate of human errors
  • human retention over time

• Assess subjective satisfaction (Questionnaire for User  Interaction Satisfaction 7.0, www.lap.umd.edu/QUIS/index.html)

• Accommodate individual differences

• Consider social, organizational & cultural context

  
  

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