Royal Deer Design » usability problems http://www.royaldeerdesign.com Web Design Company Thu, 21 Aug 2025 15:08:29 +0000 en-US hourly 1 Usability Testing – guide and stats http://www.royaldeerdesign.com/2010/05/usability-testing-guide-and-stats/ http://www.royaldeerdesign.com/2010/05/usability-testing-guide-and-stats/#comments Sun, 23 May 2010 09:33:00 +0000 http://coot.arvixe.com/~royald/?p=2268 Who should we ask to test our design? Should that be an experts or rather novices? In 1992 Jakob Nielsen (born 1957 in Copenhagen, Denmark, a leading web usability consultant) made an experiment, in which he used three groups of evaluators: Novice, Double and Double.

  • Novice – no experience in usability engineering
  • Regular – general usability specialists
  • Double – specialists in particular subject of an experiment

It was found that:

  • The novices found 22% of the usability problems
  • The regulars found 41%
  • The doubles found 60%

Nielsen concluded also that:

  • Group of 5 novices would find 50% of the usability problems
  • 5 regular specialists would find about 80%
  • 5 double specialists would find 98% of the problems
]]> http://www.royaldeerdesign.com/2010/05/usability-testing-guide-and-stats/feed/ 0