Hacker News
- You Only Need to Test with 5 Users (2000) https://www.nngroup.com/articles/why-you-only-need-to-test-with-5-users/ 2 comments
- You Only Need to Test with 5 Users (2000) https://www.nngroup.com/articles/why-you-only-need-to-test-with-5-users/ 107 comments
- Why you only need 5 users for usability testing http://www.useit.com/alertbox/20000319.html 20 comments