Wednesday, June 24, 2015

Usable Security - Evaluation

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1. Heuristic Evaluation: Analyzing a system according to a set of guidelines for good usability.
2. The goal of Usable Security
  •  To measure and describe usability of a system for given tasks
3. The following are NOT the goal of Usable Security:
  • To develop new measures of usability
  • To test the security of a system
  • To study the theoretical aspects of usability
4. What is the goal of A/B testing?
  • To compare the performance two (or more) interface variations
5. Statistical tests showed that the password group logged in significantly faster than the voice-recognition group
6. What would you do when running a controlled experiment to evaluate an interface?
  • Have some people try using the control interface while other people try using the experimental interface
  • Have each person in the experiment try both interfaces.
  • Provide users with training and instructions on how to use the control and experimental interfaces
7. What not to do
  • Select average users to test the control interface and expert users to test the experimental interface.
8. Qualitative evaluation is intended to: Understand user experiences and reactions to a design
9. Qualitative evaluation is not intended to:
  • Count the number of errors a user makes when using the system
  • Time how long it takes a user to complete a task
  • Measure how well a user remembers the steps required to complete a task
10. Following are standard observation method:
  •  Silent Observer
  • Constructive Interaction
  • Think Aloud
11. Why do we conduct usability studies on systems that have already been designed?
It is because Despite their best efforts, designer and developers cannot know exactly how users will interact with their system. A usability study will find previously uncovered errors.    

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  7. Which of the following are typical questions to ask on a pre-test questionnaire?


    How difficult was it to complete task 1


    What is your highest level of education


    What was most challenging about using the interface


    What is your age

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    Replies
    1. -What is your highest level of education
      -What is your age

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