When are Semi-Structured Interviews better than Structured Interviews?
A: Semi-structured interviews are better than structured interviews because they involve some
sequence, but is flexible to deviate and explore an a
...
When are Semi-Structured Interviews better than Structured Interviews?
A: Semi-structured interviews are better than structured interviews because they involve some
sequence, but is flexible to deviate and explore an answer that a respondent left that is
interesting.
2. What is the reason for the final question asked at each step in a Cognitive Walkthrough?
A: To make sure that the person learns whether or not they made the correct action through
feedback
3. What is meant by the term Ecological Validity?
A: The realism of the test scenario
4. Imagine conducting a study to compare two password systems. State two reasonable Dependent
Variables
A: The amount of time it takes to log in using each password system. The memorability of the
password systems
5. In conducting experiments to examine differences in usability between two systems, we
normally emphasize performance measures. Why is it also beneficial to use questionnaires?
A: We can use questionnaires to get demographic, opinion, and feedback data
6. Imagine that the university has commissioned two candidates for a new website for course
registration. Describe a quantitative approach to compare the usability of the two websites
A: An experiment would be conducted. The independent variables are the two websites. The
dependent variables would be measures that indicate website performance. This might be:
number of registrations, time taken for registration, number of clicks on links for help, number
of errors people make.
7. Describe the four types of user studies?
a. Lab based study. Advantages: measures performance and improvements. Disad: hard to
get realism, novelty effect
b. Field based study. Pros: measures real life usability. Disad: data can be messy, hard to
observe/record
c. Online study. Pros: easy to record. Cons: Technical challenges
d. Crowdsourced study: Pros: cheap, many participants. Cons: Variation between
participants
8. Compare and contrast between-subjects and within-subjects user studies
A: Between-subjects study is where each participants is in only 1 test condition, however withinsubjects study is where all participants are in all test conditions
9. Describe the differences between lab-based and field-based user studies?
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