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Formal Usability Studies

As soon as you have a running prototype of your Web site, you can start getting hard numbers on whether the site meets the goals your team has set. For example, one of your goals might be that customers be able to register and create an account in less than two minutes. You can run this study with as few as ten participants, though it generally takes more participants when you want to test numerical goals.

The type of information to collect in this situation is quantitative bottom-line data. Bottom-line data consists of hard numerical metrics where you are looking for statistical significance—a serious and reliable difference instead of one due to chance.


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