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SUS

by Jeff Sauro, PhD | January 15, 2019

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UX ( 62 )
 Methods ( 52 )
 Usability Testing ( 52 )
 Statistics ( 51 )
 Usability ( 32 )
 Survey ( 32 )
 User Research ( 27 )
 Benchmarking ( 27 )
 Customer Experience ( 26 )
 SUS ( 21 )
 NPS ( 21 )
 Sample Size ( 18 )
 Usability Problems ( 17 )
 Net Promoter Score ( 15 )
 Rating Scale ( 14 )
 Usability Metrics ( 13 )
 Metrics ( 13 )
 SUPRQ ( 12 )
 Measurement ( 12 )
 User Experience ( 11 )
 Qualitative ( 11 )
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 Task Time ( 8 )
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 UX Metrics ( 7 )
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 Reliability ( 6 )
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 SUPR-Q ( 3 )
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 UMUX-lite ( 2 )
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Can UX Metrics Predict Software Revenue Growth?

By Jeff Sauro, PhD . January 15, 2019 . Tags: ,
Does better usability lead to more revenue? What about positive word of mouth? Is it tied to revenue growth? Are UX metrics for usability and intent to recommend able to track future revenue growth? Many UX researchers who work for software companies or on software products collect UX metrics. In fact, we strongly advocate for it. As part of implementing a plan to improve UX,

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Can You Use a Single Item to Predict SUS Scores?

By Jeff Sauro, PhD . December 4, 2018 . Tags:
The System Usability Scale (SUS) has been around for decades and is used by hundreds of organizations globally. The 10-item SUS questionnaire is a measure of a user’s perception of the usability of a “system,” which can be anything from software, hardware, websites, apps, or voice interfaces. The items are: I think that I would like to use this system frequently. I found the system

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5 Ways to Interpret a SUS Score

By Jeff Sauro, PhD . September 19, 2018 . Tags:
The System Usability Scale (SUS) is a popular measure of perceived usability. It's a 10-item questionnaire scored on a 101-point scale and provides a measure of a user’s perception of the usability of a “system.” A system can be just about anything a human interacts with: software apps (business and consumer), hardware, mobile devices, mobile apps, websites, or voice user interfaces. By itself though, the

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Interpreting Single Items from the SUS

By Jeff Sauro, PhD . July 10, 2018 . Tags: ,
The System Usability Scale has been around for decades and is used by hundreds of organizations globally. The 10-item SUS questionnaire is a measure of a user’s perception of the usability of a “system.” A system can be just about anything a human interacts with: software apps (business and consumer), hardware, mobile devices, mobile apps, websites, or voice user interfaces. The SUS questionnaire is scored

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Recent Advances with the System Usability Scale

By Jeff Sauro, PhD . November 7, 2017 . Tags: ,
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

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Measuring Usability: From the SUS to the UMUX-Lite

By Jeff Sauro, PhD . October 10, 2017 . Tags: , ,
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

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Why the SUPR-Q is better than the SUS for websites

By Jeff Sauro, PhD . June 27, 2017 . Tags: , ,
When I started systematically measuring website usability over 10 years ago I started with the SUS as a key metric. The System Usability Scale (SUS) was the natural questionnaire to start with. It was then, as it is now, a popular 10-item questionnaire to measure the perceived usability of interfaces. It’s been around for over 30 years and because of the wording of the items

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UX & NPS Benchmarks for Consumer Software (2017)

By Jeff Sauro, PhD . June 20, 2017 . Tags: , , ,
Positive word of mouth is a critical driver of future growth for consumer software products. Along with features and capabilities, user experience is a key determinant of how likely users adopt new technology and recommend software. We’ve found that usability accounts for between 30% and 60% of the variation in Net Promoter Scores. A positive experience leads customers to recommend a product. A negative experience,

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Business Software UX & NPS Benchmarks

By Jeff Sauro, PhD . May 23, 2017 . Tags: , , ,
Despite the attention consumer-based mobile apps, websites, and software get, a lot of the world depends on business software. Business software supports core functions for organizations such as productivity tasks, communication, accounting, and sales. Along with features and capabilities, the user experience of software is a key determinant of how likely users adopt new technology and recommend the product. Benchmarking is an essential step in

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Can You Change A Standardized Questionnaire?

By Jeff Sauro, PhD . August 30, 2016 . Tags: ,
Questionnaires are an effective way for gauging sentiments toward constructs like usability, loyalty, and the quality of the website user experience. A standardized questionnaire is one that has gone through psychometric validation. That means the items used in the questionnaire have been shown to: 1. Offer consistent responses (reliability) 2. Measure what they are intended to measure (validity) 3. Are able to differentiate between good

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