Simple usability tests where users think out loud are cheap, robust, flexible, and easy to learn. Thinking aloud should be the first tool in your UX toolbox, even though it entails some risks and doesn't solve all problems.| Nielsen Norman Group
Elaborate usability tests are a waste of resources. The best results come from testing no more than 5 users and running as many small tests as you can afford.| Nielsen Norman Group
Learn how to use quantitative metrics to benchmark your products and demonstrate return on investment for your design projects.| Nielsen Norman Group
When collecting usability metrics, testing with 20 users typically offers a reasonably tight confidence interval.| Nielsen Norman Group
Labels or sample text inside a form field makes it difficult for people to remember what information belongs in that field once they start data entry.| Nielsen Norman Group
