Your program might be easy for you to use, but can someone else use it just as easily? If we want people to use open source software, it has to be easy to learn and easy to use, or people will not use it. In this session, we'll learn about usability testing - what it is, why it's important, and how to do it. You don't need a "usability lab" to do usability testing - you don't even need to be in the same room. You can learn a lot just by watching five people use the software to do a set of tasks. We'll walk through all the steps to do your own usability test and how to understand the results so you can make your software even better.