The web designer's guide to user experience

Throughout UX design, testing is important to affirm theories. At Clearleft, designers' web knowledge enables the process to begin in-house via cognitive walkthroughs – designers imagining themselves using a site – but real users are needed for the best results.

Budd notes that you can test paper prototypes, "which requires a little leap of faith from test subjects, since they're seeing and interacting with paper websites," but Clearleft prefers working with interactive HTML and CSS prototypes, with Silverback recording tests.