Usability testing

Usability testing is a research method in which real users try to complete realistic tasks on a website, app or prototype while observers note where they struggle. It reveals friction that designers and developers, too close to the product, no longer see.

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What is usability testing?

Usability testing evaluates how easily people can use an interface to reach a goal. A participant is given a task, such as "find the price of the premium plan and start a trial", and attempts it without help while a facilitator watches and records what happens. The aim is not to ask users what they like but to observe what they actually do.

It matters because opinions inside a team are poor predictors of real behaviour. Even five participants typically surface most major problems, and finding them before launch is far cheaper than fixing them after. The result is a prioritised list of real obstacles, backed by recordings and quotes that make it easier to convince stakeholders than any internal opinion.

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How a usability test works

1. Define goals and tasks: pick the journeys that matter, such as signing up, searching or checking out.
2. Recruit participants: choose people who resemble your real audience, ideally 5 to 8 per round.
3. Run sessions: ask participants to think aloud while they work, and avoid leading them.
4. Capture evidence: record screens, clicks, timings and quotes.
5. Analyse and prioritise: group problems by severity and frequency, then propose fixes.

A simple task script keeps sessions comparable:

Task 2: You want to book a call for next week. Show me how you would do it. (Success: booking confirmed. Time limit: 3 minutes.)

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Types of usability testing

• Moderated: a facilitator guides the session live, in person or by video, and can ask follow-up questions.
• Unmoderated: participants complete tasks alone, recorded by a tool, which scales faster and costs less.
• Remote vs in-person: remote reaches more varied participants, while in-person gives richer body-language cues.
• Prototype testing: checks a design before any code is written.
• Live-site testing: checks the shipped product and often exposes real-world issues.

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Usability testing vs A/B testing vs analytics

Analytics shows that a problem exists, usability testing explains it, and A/B testing validates the fix. Used in that order, the three methods turn a vague feeling that "the page does not convert" into a precise, tested improvement.

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Best practices and common pitfalls

Write neutral tasks that describe a goal, not the interface ("buy a gift for a friend" rather than "click the Shop button"). Test early and often with low-fidelity prototypes, and fix the most severe issues before the next round. Keep the facilitator quiet: answering questions or hinting hides the very problems you are looking for.

Frequent mistakes include recruiting colleagues instead of real users, testing too many tasks in one session, collecting opinions rather than behaviour, and producing a long report that nobody turns into changes. Obtain consent before recording and handle personal data in line with the GDPR.

Measure success with simple indicators: task completion rate, time on task, number of errors and a satisfaction score such as the System Usability Scale. Repeat the same tasks after each redesign to confirm that the changes really improved the experience.

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Usability testing at BeBranded

We test key journeys on prototypes and live sites to remove friction before it costs conversions, then feed the findings back into the interface. It is a core step of our design service.