research methods
Usability testing
What is usability testing?
Watch real users attempt real tasks with your design to spot where it breaks down. Focus on what they actually do - not just what they say - and note their expectations, interpretation, confidence, and perceived effort. Give them a task, observe closely, and ask questions to understand why.
Also known as: user testing
Prefer to watch?
Watch the recap 0:36
The demo
A usability test, stripped to its bones, is five moves. Here is one you have already taken part in on this very site:
- Pick a real task. Not "browse around" but something with a right answer: find the cheapest plan, get to billing, spot what changed.
- Hand it over and stay quiet. The moment you explain the interface, you have stopped testing it. Let the person struggle; the struggle is the finding.
- Watch what they do, not what they say. Where did the first click land? Where did they stall? What did they skip entirely?
- Find the telling moment. The pause before a wrong turn, the label that read the wrong way, the button nobody saw. One honest stumble is worth a page of opinions.
- Fix it, then test again. A test that doesn't change the design was a survey. Close the loop.
The research-methods entries each take one slice of this and let you feel it: the five-second test measures first impressions, first-click testing measures the opening move, and heuristic evaluation is the cheap expert pass you run before you spend real testing time.
Usability testing means watching real users try real tasks to find where a design fails. Prioritise behaviour over opinion - test tasks, not reactions - but don’t ignore what they think: expectations, interpretation and confidence matter too, as long as behaviour stays primary. Even a few people will reveal most serious issues. You can see and try this concept in action on this page.
The golden rule is to test tasks, not opinions. Ask "what do you think of this" and you get politeness; ask "show me how you'd do X" and you get the truth. People are unreliable narrators of their own behaviour, so watch the behaviour and treat the commentary as a clue, not a verdict.
You need far fewer participants than you'd think. Five people will surface the large majority of the serious problems - so test five, fix what they hit, then test five more. Big samples are for measuring how bad something is, not for discovering that it is broken.
Watch a usability testing video to see real users struggle with your design - the behaviour they show is the most reliable evidence. You can try this concept in action on this page using our hands-on interactive demo - no screenshots, just live user testing you can operate yourself.
Try the usability testing video demo on this page to see real users interact with your design - behaviour reveals more than words. You don’t need to watch a video to learn - our interactive demo lets you run usability testing video simulations live, without leaving this page.