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Research / Structure / Validation / 06

Test, synthesize, decide

Run a five-person usability study, separate signals from anecdotes, and prioritize the next iteration.

Time
90 min
Mode
Learn → Make → Check
Path
UX & Product Design

By the end, you can…

A usability test evaluates the design

Five thoughtful sessions can reveal many severe interaction problems, but the number is not a universal law. Recruit people who resemble the intended audience and test representative tasks.

Avoid teaching the interface through the task. “Find out whether this plan supports guests” is better than “Click Pricing, then compare plans.” Ask participants to think aloud without turning the session into an interview.

Findings need a decision

Record observable behavior: path taken, hesitation, error, recovery, and outcome. A participant saying “I like it” is feedback; failing to find the save action is usability evidence.

Prioritize by severity, frequency, reach, and confidence. Recommend the smallest change that addresses the cause, then retest. Do not convert every comment into a feature.

Your studio task

Make — Facilitate five task-based sessions and turn observations into ranked changes.

  1. Write three realistic, neutral tasks.
  2. Run sessions with five representative participants where practical.
  3. Log observable behavior and quotes separately.
  4. Rank findings, revise the highest-severity issue, and retest it.
Definition of done

Every recommendation points to evidence, severity, frequency, and product intent.

Open the interactive lesson with its workspace ↗

Knowledge check

Which observation is strongest usability evidence?
  1. Three participants could not find how to save and abandoned the task
  2. One participant preferred blue
  3. A stakeholder called the page clean
Reveal answer (A)

Repeated task failure directly connects interface behavior to an intended outcome.

When is a usability finding strongest?
  1. Several participants fail the same task and it blocks the intended outcome
  2. One participant calls the page clean
  3. A stakeholder prefers a different color
Reveal answer (A)

Repeated, observable task failure tied to an intended outcome is the strongest evidence.