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It probably depends on how "focused" your software is. If you have a very specific user in mind, you can test against as few as 3 users that fit the description
by serhei 18y ago
It probably depends on how "focused" your software is. If you have a very specific user in mind, you can test against as few as 3 users that fit the description, just to see if your specific user actually works the way you thought. If your software is trying to appeal to a wide range of users you might have to go up to 15 or even more.
- henning 18y agoFirst let me say I've never done usability testing. But from what I've read, the right way to do it would be multiple distinct tests, each with a group of 3-5 users, with one group for each major user category. Lots of tests with small user groups is much better than fewer tests with more users.