Usability
Testing
Surprise of Usability Testing
Sped up many projects and produced
dramatic cost savings
Goal to find flaws and refine interface
Participants Selection
Voluntary Participation Critical (obtain informed consent)
Effective Usability Testing
Encourage users to think
aloud (two people better)
Usability Lab
Halfway mirror between
observers and subjects
Videotaping
Show designers actual user behavior
Tedious and time-consuming to analyze video
Limitations of Usability Testing
Emphasizes first-time usage
Limited coverage of the interface features
Expert reviews can supplement usability testing