![]() The most striking truth of the curve is that zero users give zero insights.Īs soon as you collect data from a single test user, your insights shoot up and you have already learned almost a third of all there is to know about the usability of the design. Plotting the curve for L =31% gives the following result: The typical value of L is 31%, averaged across a large number of projects we studied. ![]() Where N is the total number of usability problems in the design and L is the proportion of usability problems discovered while testing a single user. In earlier research, Tom Landauer and I showed that the number of usability problems found in a usability test with n users is: The best results come from testing no more than 5 users and running as many small tests as you can afford. Elaborate usability tests are a waste of resources. 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |