A Fundamental Mind Shift For Usability Testing
Mature organisations focus on proactive research instead of reactive research. 5 users is enough doesn’t apply here.
How Many Participants are Really Enough for Usability Studies?
[Sciencific read] There is a lot of discussion going on if 5 respondents is enough for a usability test or not. This scientific study discusses all arguments and sets up an experiments to find the optimal number of respondents.
How Many Test Users in a Usability Study?
Jacob Nielsen argues that it is best to invite 5 participants in a usability test. This number has the biggest ROI.
Why you only need to test with five users (explained)
There is and has been a lot of debate about the magical number of five users for usability testing. Jeff explains the discussion from a statistical perspective.