UX
Usability Testing
A practical UX method for identifying usability issues by watching real users attempt real tasks.
How to use usability testing to uncover friction, errors, and failure points so you can improve the experience with confidence.
Quick take
If you want to see where users struggle, get stuck, or fail to complete tasks, run usability testing.
Related Services
What it is
glossaryUsability TestingUsability testing is a research method used to evaluate how easily users can complete tasks within a product or service.Open glossary term is a UX serviceUser ResearchUnderstand user behaviour, validate ideas, and make clearer product decisions with evidence you can act on.Open service method used to observe real users attempting to complete tasks using a product or glossaryPrototypeA prototype is an early version of a product used to test ideas, interactions, and concepts.Open glossary term.
Participants are given realistic scenarios and asked to complete specific tasks while their glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term is observed.
It focuses on identifying glossaryUsabilityUsability is how easy and efficient it is for users to complete tasks within a product. It focuses on clarity, simplicity, and reducing effort so users can achieve their goals without confusion or friction.Open glossary term issues such as confusion, errors, inefficiencies, and glossaryFrictionFriction refers to anything that slows users down or makes it harder for them to complete a task. It can be caused by poor design, unnecessary steps, unclear messaging, or technical issues.Open glossary term.
Unlike analytics, which shows what users do at scale, glossaryUsability TestingUsability testing is a research method used to evaluate how easily users can complete tasks within a product or service.Open glossary term shows why they struggle.
The goal is to uncover problems in the experience and understand how to fix them.
Usability testing is useful because it turns assumptions about what works into observed evidence of what actually happens.
When to use it
Use this method when you need to understand how well something actually works.
It is most useful when:
It is less useful when:
Usability testing is often used alongside analytics and interviews to combine behaviour with understanding.
Key takeaway
Use usability testing when the main question is whether people can actually complete the task and where the experience is getting in their way.
How to run it
Set up properly.
Before you start, be clear on what you want to test, which tasks users will complete, and who your participants are.
Design realistic scenarios, not artificial tasks.
Run the method.
glossaryUsability TestingUsability testing is a research method used to evaluate how easily users can complete tasks within a product or service.Open glossary term is observational and structured.
Give users clear tasks based on real scenarios. Ask them to glossaryThink Aloud ProtocolThink aloud protocol is a method where users verbalise their thoughts while completing tasks.Open glossary term as they complete tasks. Observe glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term, not just outcomes. Avoid leading or helping too much. Capture both success and failure.
The goal is to see how users naturally interact.
Capture and make sense of it.
The value comes from identifying glossaryPatternA reusable solution to a common design problem.Open glossary term.
Look across glossarySessionA session is a single period of user interaction with a product, from entry to exit within a defined timeframe.Open glossary term to identify common points of confusion, repeated errors or failures, inefficiencies in glossaryTask CompletionTask completion measures whether users can successfully complete a specific task.Open glossary term, and differences between users.
Focus on recurring issues, not individual opinions.
What to look for
Focus on:
Where it goes wrong
Most issues come from:
What users do matters more than what they say.
What you get from it
Done properly, this method gives you:
Key takeaway
It helps you build experiences that actually work.
Get in touch
If this sounds like something you need, we can help you uncover what is not working and fix it quickly.
No guesswork. No assumptions. Just clear glossaryInsightAn insight is a meaningful understanding that explains why something is happening and what it means.Open glossary term you can act on.
FAQ
Common questions
A few practical answers to the questions that usually come up around this method.
What is usability testing in UX?
glossaryUsability TestingUsability testing is a research method used to evaluate how easily users can complete tasks within a product or service.Open glossary term is a method used to observe users completing tasks to identify issues in an experience.
When should you use usability testing?
Use it when testing designs, glossaryPrototypeA prototype is an early version of a product used to test ideas, interactions, and concepts.Open glossary term, or live products.
How many users do you need?
Typically 5 to 8 users per round is enough to identify most glossaryUsabilityUsability is how easy and efficient it is for users to complete tasks within a product. It focuses on clarity, simplicity, and reducing effort so users can achieve their goals without confusion or friction.Open glossary term issues.
What is the think-aloud method?
It involves asking users to verbalise their thoughts while completing tasks.
Does usability testing improve UX?
Yes. It directly identifies problems that impact glossaryUsabilityUsability is how easy and efficient it is for users to complete tasks within a product. It focuses on clarity, simplicity, and reducing effort so users can achieve their goals without confusion or friction.Open glossary term and success.