Seth Nickell outlines why usability testing is not the be-all and end-all of usability. This is fascinating. I’d never really thought of this sort of thing before—that testing a web application has entirely different requirements from testing a desktop application, because websites have “learnability“, how much they encourage users who have never used the system before, as a much more influential criterion than do desktop applications. HCI aspects of the web are not the same as the desktop. I need to remember this.