What does the System Usability Scale sus measure?
Consequently, SUS scores may be more helpful as a tool for comparison (between competitors, iterations, etc.,) or when used in conjunction with formative usability testing methods to provide a holistic view of real and perceived user experience.
What is a good system usability scale?
What is a Good SUS Score? The average SUS score from all 500 studies is a 68. A SUS score above a 68 would be considered above average and anything below 68 is below average. The best way to interpret your score is to convert it to a percentile rank through a process called normalizing.
What is SUS in usability testing?
The System Usability Scale (SUS) provides a “quick and dirty”, reliable tool for measuring the usability. It consists of a 10 item questionnaire with five response options for respondents; from Strongly agree to Strongly disagree.
How is SUS scale calculated?
How to calculate a SUS score
- Add up the total score for all odd-numbered questions, then subtract 5 from the total to get (X).
- Add up the total score for all even-numbered questions, then subtract that total from 25 to get (Y).
- Add up the total score of the new values (X+Y) and multiply by 2.5. Example scoring:
What SUS scores mean?
Abstract. The System Usability Scale (SUS) is an inexpensive, yet effective tool for assessing the usability of a product, including Web sites, cell phones, interactive voice response systems, TV applications, and more. It provides an easy-to-understand score from 0 (negative) to 100 (positive).
How do you read Sus?
How to Calculate Your Usability Score using SUS
- For each of the odd numbered questions, subtract 1 from the score.
- For each of the even numbered questions, subtract their value from 5.
- Take these new values which you have found, and add up the total score. Then multiply this by 2.5.
What does sus measure?
System Usability Scale (SUS) is a questionnaire to measure usability perception. It was found by John Brooke in 1986 and used to test the office electronic system back then.
What is SUS evaluation?
System Usability Scale (SUS) is a questionnaire that is used to evaluate the usability of products and services. These survey questions are used as a quantitative method to evaluate and get actionable insights on the usability of a wide variety of new systems which may be either software or hardware.
What do SUS scores mean?
System Usability Scale
Abstract. The System Usability Scale (SUS) is an inexpensive, yet effective tool for assessing the usability of a product, including Web sites, cell phones, interactive voice response systems, TV applications, and more. It provides an easy-to-understand score from 0 (negative) to 100 (positive).
What is a sus survey?
The System Usability Scale (SUS), created by John Brooke in 1986, offers a quick and effective way to evaluate the usability of your products and designs.
What would a SUS score of 80 mean for your system?
SUS and customer loyalty So if your website has an SUS score over 80, there is a good chance that the site will be recommended, while if it has an SUS score under 70, it may get negative reviews or comments.
What is SUS short for?
Sus is a shortening of suspicious or suspect. In slang, it has the sense of “questionable” or “shady.”