Score

System usability scale validity

System usability scale validity
  1. What is an acceptable SUS score?
  2. What are the limitations of SUS?
  3. Is the system usability scale subjective?

What is an acceptable SUS score?

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 are the limitations of SUS?

Limitation 2: A SUS Score is not a diagnostic test

The SUS score cannot tell you specifically which parts of your website or product cause users issues. To get that data, you need to observe users interacting with a website or product. For this reason, the score is most useful when coupled with UX study results.

Is the system usability scale subjective?

The SUS is a subjective measure of perceived usability.

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