UMUX-lite

by Jeff Sauro, PhD | November 7, 2017

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Recent Advances with the System Usability Scale

By Jeff Sauro, PhD . November 7, 2017 . Tags: UMUX-lite, SUS

The System Usability Scale (SUS) is the most widely used questionnaire for measuring the perception of usability. It’s been around for more than 30 years. While its original term “system” has fallen somewhat out of favor, its usage has not—with thousands of citations in the literature. The system can be anything from business software, consumer software, websites, mobile apps, or hardware. With such wide usage

By Jeff Sauro, PhD . October 10, 2017 . Tags: UMUX-lite, Questionnaires, SUS

Many researchers are familiar with the SUS, and for good reason. It’s the most commonly used and widely cited questionnaire for assessing the perception of the ease of using a system (software, website, or interface). Despite being short—10 items—the SUS has a fair amount of redundancy given it only measures one construct (perceived usability). While some redundancy is good to improve reliability, shorter questionnaires are