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Web Usability UCR Webmasters Support Group Michael Yonezawa September 9th, 2004 What is Usability? Usability is the measure of the quality of a user's experience when interacting with a product or system — whether a Web site, a software application, mobile technology, or any user-operated device. http://www.usability.gov What is Usability? Usability is a combination of factors that affect the user's experience with the product or system, including: – Ease of learning – Efficiency of use – Memorability – Error frequency and severity – Subjective satisfaction Ease of learning How fast can a user who has never seen the user interface before learn it sufficiently well to accomplish basic tasks? Efficiency of use Once an experienced user has learned to use the system, how fast can he or she accomplish tasks? Memorability If a user has used the system before, can he or she remember enough to use it effectively the next time or does the user have to start over again learning everything? Error frequency and severity How often do users make errors while using the system, how serious are these errors, and how do users recover from these errors? Subjective satisfaction How much does the user like using the system? Print Resources • An Introduction to Usability by Patrick W. Jordan • Don’t Make Me Think: a common sense approach to web usability by Steve Krug • Information Architecture: for the World Wide Web by Rosenfield & Morville • Home Page Usability: 50 websites deconstructed by Nielson & Tahir • Designing Web Usability: the practice of simplicity by Jakob Nielson More Print Resources • 250 HTML and Web Design Secrets by Molly E. Holzschlag • Usability Evaluation of Online Learning Programs edited by Claude Ghaoui • Usability Testing of Voting Systems by Federal Election Commission • Handbook of Usability Testing: how to plan, design, and conduct effective tests by Jeffrey Rubin Online Resources • Information Architecture: for the World Wide Web by Louis Rosenfeld and Peter Morville • Usability Testing of Voting Systems by Federal Election Commission • Usability and the Web: an overview by George Murray and Tania Costanzo, at the National Library of Canada, http://www.nlc-bnc.ca/9/1/p1-260-e.html More Online Resources • What is Usability?, by Environmental Systems Research Institute, Inc., http://www.esri.com/software/usability/whatisusability.html • Usability.gov U.S. Department of Health and Human Services http://www.usability.gov/ • Usability Testing of World Wide Web Sites by U.S. Department of Labor Bureau of Labor Statistics [PDF version] http://stats.bls.gov/ore/htm_papers/st960150.htm http://stats.bls.gov/ore/pdf/st960150.pdf Even More Online Resources • Notes on Usability Testing by W3C Web Accessibility Initiative http://www.w3.org/WAI/EO/Drafts/UCD/ut.html • useit.com: Jakob Nielsen on Usability and Web Design http://www.useit.com • User Testing Techniques - a reader-friendliness checklist by All Things Web http://www.pantos.org/atw/35317.html Did You Know? • The Webby Awards http://www.webbyawards.com/ • User Experience 2004 Conference http://www.nngroup.com/events/