Why You Only Need to Test with 5 Users by Jakob Nielsen June 2, 2017 / kaynewman / Usability Testing Resources Why You Only Need to Test with 5 Users by JAKOB NIELSEN Summary: Elaborate usability tests are a waste of resources. The best results come from testing no more than 5 users and running as many small tests as you can afford. Share this:Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Click to print (Opens in new window) Jakob Nielsen