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Usability Testing Basics

  |  July 17, 2000   |  Comments

Last year, usability testing was a tough sell. Web development is almost always done under ridiculous time constraints, and usability was seen as an advantageous but unnecessary step in developing a site. Since then, the industry has come a long way. Usability testing is now recognized as a necessary, if not integral, part of web site development.

Last year in this space, in an article titled "Build a Site, Not a Labyrinth," I argued that building a web site without input from customers can be a recipe for disaster.

It was a tough sell. Web development is almost always done under ridiculous time constraints, and usability was seen as an advantageous but unnecessary step in developing a site. Even when sites were tested, there was no time to iterate or incorporate learning from the tests before launch.

Since then, the industry has come a long way. Usability testing is now recognized as a necessary, if not integral, part of the development of web sites. As the industry has matured, three simple truths have emerged:

  1. If customers find your site difficult to use, they will get frustrated and leave.

  2. It is not a good thing if customers leave your site.

  3. If you don't test your site with actual customers before launch, you can't ensure customers won't leave your site.

As these tenets become apparent, clients have begun to expect that their agencies employ usability testing in the web development process. For the uninitiated, here are some basics.

What is usability testing?

There are many ways to get feedback from customers about the usability of a site. What is most commonly referred to as usability testing, however, is one-on-one interviews with customers to explore their opinions about a site or site prototype.

This is how it generally works. A moderator sits down with a participant representing the site's ultimate target (a customer or potential customer). The moderator observes the participant using a version of the web site in development, usually as the participant tries to accomplish tasks. The participant gives feedback on the process, telling the moderator (and everyone watching, usually behind a mirror) what he or she likes and dislikes about the site and what frustrations he or she has while using the site. This information is used to revise the site in development or redesign.

Where does it fit in the process?

Usability testing comes in many flavors and should occur at different points in the development process.

Explorative testing gathers input from participants in the early stages of site development. Based on the experience and opinions of target users, the development team can decide the appropriate direction for the site's look and feel, navigation, and functionality.

Assessment testing occurs when the site is close to launch. Here you can get feedback on issues that might present huge problems for users but are relatively simple to fix.

Evaluation testing can be useful to validate the success of a site subsequent to launch. A site can be scored and compared to competitors, and this scorecard can be used to evaluate the project's success.

How do I learn more?

There are a number of places on the web where you can learn more. The Usability Special Interest Group provides copious resources to help develop an in-house capability. The Usability Professionals' Association is a hub for usability conferences, events, and information about usability best practices.

As web devices proliferate and computing diverges to new platforms, usability will become even more important. Testing web pages is only the beginning; no matter what role you play in the Internet industry, it's smart to start learning about usability testing now.

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Jeffrey Graham

Jeffrey Graham is vice president of client development at Dynamic Logic, a company he joined in January of 2001. Dynamic Logic specializes in measuring the branding effectiveness of online marketing. Jeffrey has served as research director at two online advertising agencies, Blue Marble and NOVO, and has worked with clients such as General Motors, Procter & Gamble, and Continental Airlines. He has taught Internet Research at New York University and has a Masters degree in the subject.

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