Usability Testing and Evaluation
Moderated vs. unmoderated testing, heuristic evaluation, task success metrics, the SUS scoring formula, think-aloud facilitation, and knowing usability testing from A/B testing when interviewers push on 'how would you validate this'
Covers moderated vs. unmoderated usability testing and the factors that decide between them, heuristic evaluation against Nielsen's 10 heuristics as a complement to (not replacement for) real user testing, the completion-rate/time-on-task/error-rate triad and why you need all three together, the System Usability Scale's exact 10-item structure and 0-100 scoring formula with Bangor/Kortum/Miller benchmarks, the think-aloud protocol and its common facilitation pitfalls, when A/B testing is the right tool versus when usability testing is, and the recruiting/sample-size/confirmation biases that undermine a study's findings.
Practice questions (5)
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Choosing Between Moderated and Unmoderated Testing Under a Deadline
Intermediate · Free -
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Scoping a Two-Week Redesign Evaluation With a Fixed Budget
Intermediate · Free -
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Reconciling a High SUS Score With a Low Completion Rate
Intermediate -
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A Stakeholder Wants to A/B Test a Problem That Isn't Diagnosed Yet
Intermediate -
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Auditing a Usability Study Report for Hidden Bias
Intermediate