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In A Practical Guide to Usability Testing, the authors begin by defining usability, advocating and explaining the methods of usability engineering and reviewing many techniques for assessing and assuring usability throughout the development process. They then take you through all the steps in planning and conducting a usability test, analyzing data, and using the results to improve both products and processes. Written in plain English and filled with examples from many types of products and tests, A Practical Guide to Usability Testing discusses the full range of testing options from quick studies with a few subjects to more formal tests with carefully designed controls. The authors discuss the place of usability laboratories in testing as well as the skills you need to conduct a test. Included are forms that you can use or modify to conduct a usability test and layouts of existing labs that will help you build your own. The authors, a human factors psychologist and a linguist, have extensive experience conducting research on usability, doing usability testing, helping companies set up usability labs and programs, and teaching usability engineering and testing.