User Testing: Party of Five?

My son, Henry, participating in user testing.
My son, Henry, participating in a usability study on campus.

One of the most commonly cited rules of UX research is that just five or so users can uncover 80% of usability issues. I’ve often wondered if that’s really true given the different ways various users interact with their devices.

I’m lucky to sometimes get five users to test a new site’s navigation so I’d eagerly embrace this rule if it’s true. But is it?

Continue reading “User Testing: Party of Five?”