Usable Security Week 3 Quiz Answer

By University Of Maryland

About this Course

This course focuses on how to design and build secure systems with a human-centric focus. We will look at basic principles of human-computer interaction, and apply these insights to the design of secure systems with the goal of developing security measures that respect human performance and their goals within a system.

Week 3 Quiz Evaluation

Q1) What is the goal of A/B testing?

To allow users to choose interface options from a menu

To compare the performance two (or more) interface variations

To test users' answers to quiz questions

To create software and release it in version A, refine and release version B, and so on

Q2) What is a heuristic evaluation?

Having users test a system with low-tech paper prototypes

Analyzing a system according to a set of guidelines for good usability

Presenting a description of a system of a group of representative users

Developing a description of an example user and thinking about how he or she might use the system

Q3)What is the goal of a usability study?

To develop new measures of usability

To study the theoretical aspects of usability

To test the security of a system

To measure and describe usability of a system for given tasks

Q4) If we ran an experiment to test if password logins were faster than a voice recognition authentication system, what would be required to show passwords were faster?

The average login time for password users was lower than for voice recognition users

Statistical tests showed that the password group logged in significantly faster than the voice-recognition group

Password users remembered their passwords more easily than voice recognition users remembered how to authenticate

Q5) Which of the following is not something you would do when running a controlled experiment to evaluate an 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

Have some people try using the control interface while other people try using the experimental interface

Select average users to test the control interface and expert users to test the experimental interface.

Q6) Qualitative evaluation is intended to:

Understand user experiences and reactions to a design

Time how long it takes a user to complete a task

Count the number of errors a user makes when using the system

Measure how well a user remembers the steps required to complete a task

Q7) Which of the following is NOT a standard observation method

Silent Observer

Assisted Use

Think Aloud

Constructive Interaction

Q8) Why do we conduct usability studies on systems that have already been designed?

Users often make ignorant mistakes. A usability study will show areas in which users need better training.

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.