Sunday May 23, 2010, 9:33Who 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

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Usability Testing - guide and stats

, created on Sunday May 23, 2010, 9:33, article tagged with keywords: Usability Testing, Jakob Nielsen, usability problems, website,

Tags: Usability Testing, Jakob Nielsen, usability problems, website,

Usability Testing - guide and stats

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