Performance-Based Usability Testing: Metrics That Have the Greatest Impact for Improving a System's Usability

Authors:
Robert W. Bailey;Cari A. Wolfson;Janice Nall;Sanjay Koyani
Affiliations:
Computer Psychology, Inc, Sandy, Utah and Centers for Disease Control and Prevention, Atlanta, Georgia;Focus on U!, Tallahassee, Florida and Centers for Disease Control and Prevention, Atlanta, Georgia;Centers for Disease Control and Prevention, Atlanta, Georgia;Food and Drug Administration - Silver Spring, Maryland
Venue:
HCD 09 Proceedings of the 1st International Conference on Human Centered Design: Held as Part of HCI International 2009
Year:
2009

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Abstract

Usability testing methods and results have evolved over the last 35 years. With new advancements being introduced every year, it is important to understand the present state of the field and opportunities for further improvement. This paper will detail the research-based methods and metrics which are being used to ensure that usability recommendations are data-driven and performance-based. By focusing on the types of usability metrics being captured during usability tests, we will attempt to illustrate how usability researchers can quantifiably measure the performance of a system, use these measurements to make meaningful changes, and subsequently illustrate the improvements in user effectiveness, efficiency and satisfaction.