System usability scale ux

1. What is a good system usability score?
2. What does the system usability scale measure?
3. How is SUS score calculated?
4. What do SUS scores mean?

What is a good system usability score?

Based on research, a SUS score above a 68 would be considered above average and anything below 68 is below average, however the best way to interpret your results involves “normalizing” the scores to produce a percentile ranking.

What does the system usability scale measure?

The System Usability Scale is a Likert Scale which includes 10 questions which users of your website will answer. Participants will rank each question from 1 to 5 based on how much they agree with the statement they are reading. 5 means they agree completely, 1 means they disagree vehemently.

How is SUS score calculated?

User #1 score + user #2 score + user #3 + [etc.] / # of users = SUS Score.

What do SUS scores mean?

Interpreting System Usability Scale (SUS) Score

Although each responses yield a score on a scale of 0 – 100, do not mistake it as a percentage or percentile. The average SUS score is 68. This simply means that a score of 68 will just put you at 50th percentile.