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Toolkit Support for Usability Evaluation

Toolkit Support for Usability Evaluation. 05-830 Spring 2013 – Karin Tsai. Overview. Motivation Definitions Background from Literature Examples of Modern Tools. Motivation. To improve or validate usability Comparison between products, AB tests, etc. Measuring progress

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Toolkit Support for Usability Evaluation

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  1. Toolkit Support for Usability Evaluation 05-830 Spring 2013 – Karin Tsai

  2. Overview • Motivation • Definitions • Background from Literature • Examples of Modern Tools

  3. Motivation • To improve or validate usability • Comparison between products, AB tests, etc. • Measuring progress • Verify adherence to guidelines or standards • Discover features of human cognition

  4. Usability Attributes • Learnability – easy to learn • Efficiency – efficient to use • Memorability – easy to remember how to use • Errors – low error rate; easy to recover • Satisfaction – pleasant to use and likable

  5. Evaluation Categories • Predictive • psychological modeling techniques • design reviews • Observational • observations of users interacting with the system • Participative • questionnaires • interviews • “think aloud” user-testing

  6. Challenges and Tradeoffs • Quality vs. Quantity • “Quality” defined as abstraction, interpretability, etc. • User testing – high quality; low quantity • Counting mouse clicks – low quality; high quantity • Observing Context • Abstraction • Event reporting in applications places burden on developers • Complicates software evolution

  7. CogTool • Evaluation Type: Predictive • Description: Uses a predictive human performance model (“cognitive crash dummy”) to evaluate designs.

  8. CogTool Overall Score: 6.5/10

  9. Mixpanel • Evaluation Type:Observational • Description:Aggregates developer-defined event data in useful ways.

  10. Mixpanel Overall Score: 9.5/10

  11. Chartbeat • Evaluation Type:Observational • Description: Real-time data visualization.

  12. Chartbeat Overall Score: 7/10

  13. User Testing • Evaluation Type:Participative • Description:Watch a user complete a task on your system while thinking aloud.

  14. User Testing Overall Score: 8.5/10

  15. Questions?

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