usability testing - usability metrics and wea

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usability testing - usability metrics and wea

  1. 1. Measuring Usability
  2. 2. Usability is defined by 5 quality components: 1.Learnability: How easy is it for users to accomplish basic tasks the first time they encounter the design? 2.Efficiency: Once users have learned the design, how quickly can they perform tasks? 3.Memorability:When users return to the design after a period of not using it, how easily can they reestablish proficiency? 4.Errors: How many errors do users make, how severe are these errors, and how easily can they recover from the errors? 5.Satisfaction: How pleasant is it to use the design? https://www.nngroup.com/articles/usability-101-introduction-to-usability/ Usability
  3. 3. Usability Metrics
  4. 4. Performance1 Behavioral3 Issue metrics2 Self-reported4
  5. 5. Performance1 Behavioral3 Issue metrics2 Self-reported4 Task success Time on task Errors Efficiency
  6. 6. Performance1 Behavioral3 Issue metrics2 Self-reported4 Task success Time on task Errors Efficiency Identify Issue Issue Severity
  7. 7. Performance1 Behavioral3 Issue metrics2 Self-reported4 Task success Time on task Errors Efficiency Identify Issue Issue Severity Obs:Verbal bhvr Obs: Nonverbal bhvr
  8. 8. Performance1 Behavioral3 Issue metrics2 Self-reported4 Task success Time on task Errors Efficiency Identify Issue Issue Severity Obs:Verbal bhvr Obs: Nonverbal bhvr Ease Satisfaction Clarity Comprehension etc.
  9. 9. The Usability Test
  10. 10. Opening1 UT Session: Tasks3 Pre-session Questionnaire2 Post-session Questionnaire4
  11. 11. Opening1 UT Session: Tasks3 Pre-session Questionnaire2 Post-session Questionnaire4 A. Introductions B. Explanation C. IRB D. Qs???
  12. 12. Opening1 UT Session: Tasks3 Pre-session Questionnaire2 Post-session Questionnaire4 A. Introductions B. Explanation C. IRB D. Qs??? Any variables that could influence metrics: demographics, familiarity, attitudes, etc.
  13. 13. Opening1 UT Session: Tasks3 Pre-session Questionnaire2 Post-session Questionnaire4 A. Pre-task questionnaire B. Task C. Post-task questionnaire D. Post-task interview A. Introductions B. Explanation C. IRB D. Qs??? Any variables that could influence metrics: demographics, familiarity, attitudes, etc.
  14. 14. Opening1 UT Session: Tasks3 Pre-session Questionnaire2 Post-session Questionnaire4 Any variables that could influence metrics: demographics, familiarity, attitudes, etc. A. Pre-task questionnaire B. Task C. Post-task questionnaire D. Post-task interview A. Introductions B. Explanation C. IRB D. Qs??? A. Satisfaction B. Organization C. Clarity D. Aesthetics
  15. 15. Website Experience Analysis What specific UI elements account for aspects of the user experience?
  16. 16. interpretation UX prominence specific UI elements feelings opinions attitudes etc.
  17. 17. interpretation UX prominence specific UI elements feelings opinions attitudes etc. I trust… SA 1234567 SD
  18. 18. interpretation UX prominence specific UI elements feelings opinions attitudes etc. I trust… SA 1234567 SD What about this UI makes you feel this way?

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