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Why you only need to test with 5 users (19 Mar 2000)
Some people think that usability is very costly and complex and that user tests should be reserved for the rare web design project with a huge budget and a lavish time schedule. Not true. 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.
Article URL: http://www.useit.com/alertbox/20000319.html

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