Final Flashcards
What are Quesenbery’s 5 dimensions of usability (5Es)?
Effective; Efficient; Engaging; Error-tolerant; Easy to learn.
Why evaluate the usability of user interface designs?
To check if it meets usability requirements and explore issues with users, tasks, environment, and domain.
Name two systematic techniques for usability evaluations.
User observations and UI inspections.
What kind of questions might you ask during evaluations?
Why are users unable to complete tasks? Do they like specific features? Is the UI appropriate?
What are qualitative usability requirements?
Descriptions like ‘easy’ or ‘appealing’ that are hard to measure directly.
How can qualitative data be made measurable?
By converting to quantitative metrics, e.g., ‘3 out of 4 users should complete a task.’
What two types of data are collected in usability testing?
Quantitative (numbers, times, errors) and qualitative (opinions, satisfaction).
What constraints affect evaluation strategy?
Budget; time; equipment; participant and evaluator availability.
How many users are typically enough for a usability test?
5 users.
What are task cards?
Cards given to users that describe tasks; they can be shuffled for random order.
What’s the difference between field studies and controlled studies?
Field studies are in real environments but less controlled; controlled studies offer consistency.
What is the ideal duration of an evaluation session?
Between 30 and 90 minutes.
What is the ‘think-aloud’ method?
Users verbalize thoughts while using the interface, revealing their reasoning and confusion.
Name a method for recording usability metrics.
Automatic logging; stopwatch; screen recordings; eye tracking.
What kind of data do questionnaires provide?
Quantitative data, if standardized.
What should you do if a participant refuses recording?
Use alternative methods like note-taking or anonymous surveys.
What are the key evaluator roles?
Facilitator; note-taker; equipment operator; observer; greeter; recruiter.
What is a pilot test?
A trial run to check setup, tasks, and instructions before the actual evaluation.
Why use an evaluation script?
To ensure consistency and guide facilitators during sessions.
What document is required before recording participants?
A consent form.
Name types of usability data.
Background info; notes; recordings; forms; metrics; verbal protocols.
What is a usability defect?
An issue that makes the system harder to use or learn, or reduces user satisfaction.
What is the purpose of a coding scheme in data analysis?
To group observations into categories for easier interpretation.
What are descriptive statistics?
Measures like mean or median that summarize quantitative data.
