Is there a median SUS score for internal-facing apps, vs customer-facing apps?

1. Is there any significant difference in SUS score based on gender and device?
2. What is the average SUS score?
3. How many respondents are needed for SUS?

Is there any significant difference in SUS score based on gender and device?

Results There was no significant difference between monitors in the SUS. Female gender was associated with higher SUS usability ratings. Qualitative participant-usability reports revealed distinctive shortcomings, for example, in terms of battery life and display readability.

What is the average 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.

How many respondents are needed for SUS?

Technically you need at least two users to have some measure of variability (the standard deviation) and to generate confidence intervals. We have never done a test using the SUS with only two users. We will, however, report the SUS score with just five users.