From the category archives:

Usability testing

When designing a new product, designers may have two or three graphic designs on which they would like feedback from users. These might be initial jpegs illustrating creative designs. Designers often want to know “Which design do users like best… which one should we go with?”

Prioritising usability problems  helps clients and developers allocate resources to redesign efforts. High-priority problems are more important to fix than low-priority ones. I’ve advised on 3 ways to prioritise usability problems before. But problem severity ratings are to some extent subjective – different evaluators will give different ratings. Here’s a way to validate the reliability […]

Recruiting users can be a time consuming process. If you need 10 users, you might have to make between 100 and 200 calls. And where do you get lists of potential users from? It’s not surprising that many companies decide to outsource their recruitment. I’m based in London and can recommend both Fieldworks and Saros. […]

The satisfaction that users feel when using a product is a key element of usability. For some products – for example in the leisure sector – it’s often critical. Give users a questionnaire to fill in at the end of a usability test session to measure satisfaction. I like the System Usability Scale (SUS) – research […]

Graphs are a great way of giving clients and developers a quick overview of the usability of a design and where problems lie. They summarise large amounts of data into a quick message.

I‘ve seen far too many usability reports that are a mish-mash of problems and recommendations with no clear prioritisation. The result: they don’t get implemented and the business suffers. As a User Experience specialist it’s your job to tell clients and developers what usability problems they need to fix first. Resources are not limitless. How […]

Want to impress your clients or managers? Want to make your user testing reports 42% more useful than other people’s? In this post I’ll tell you how you can do it.

You’ve been asked how many users you should test a product with. What do you say?

Here’s my advice: 7 if you have one user group, or 5 for each user group that has distinct needs.

This is fine for most products where you need to uncover problems and make design recommendations.

Usability metrics. A maze. Where do you start? At the beginning of course. Find out the purpose of your evaluation. Ask your client or developers my top 6 questions to get you facing in the right direction.

Usability testing is like cooking. I’m serious. Take tonight’s dinner for example. While it’s in the oven, you check it to see how well it’s cooking – is it drying out, how does it taste? Then, when it’s done, you serve it up and taste your mouth-watering delight (you hope!).