Example context. Preview only. Nothing is submitted.
When to sendAfter someone has used the product or completed a usability session, before the debrief.
- 01
Rate the system you used
Keep the instrument together and in its original order. Its positive and negative statements contribute to one composite; conditional follow-ups would interrupt that experience.
See the questions
- I think that I would like to use this system frequently.
- SUS item 1. Score this positively worded statement as part of the full composite; do not interpret it as a separate scale.
- I found the system unnecessarily complex.
- SUS item 2. Reverse-code this negatively worded statement as part of the full composite; do not interpret it as a separate scale.
- I thought the system was easy to use.
- SUS item 3. Score this positively worded statement as part of the full composite; do not interpret it as a separate scale.
- I think that I would need the support of a technical person to be able to use this system.
- SUS item 4. Reverse-code this negatively worded statement as part of the full composite; do not interpret it as a separate scale.
- I found the various functions in this system were well integrated.
- SUS item 5. Score this positively worded statement as part of the full composite; do not interpret it as a separate scale.
- I thought there was too much inconsistency in this system.
- SUS item 6. Reverse-code this negatively worded statement as part of the full composite; do not interpret it as a separate scale.
- I would imagine that most people would learn to use this system very quickly.
- SUS item 7. Score this positively worded statement as part of the full composite; do not interpret it as a separate scale.
- I found the system very awkward to use.
- SUS item 8. Reverse-code this negatively worded statement as part of the full composite; do not interpret it as a separate scale.
- I felt very confident using the system.
- SUS item 9. Score this positively worded statement as part of the full composite; do not interpret it as a separate scale.
- I needed to learn a lot of things before I could get going with this system.
- SUS item 10. Reverse-code this negatively worded statement as part of the full composite; do not interpret it as a separate scale.
Using the answers
For each complete response, subtract 1 from odd-numbered answers and subtract even-numbered answers from 5. Sum those contributions and multiply by 2.5. Report the composite, sample size, and uncertainty. A score of 80 is not 80% satisfied. Individual statements are not independent diagnostic scales.
System Usability Scale (SUS)
Keep the ten statements, order, five-point agreement scale, and pre-debrief timing. Item 8 uses ‘awkward’. Report one composite, not a separate learnability subscale.
When to choose another form
You need to diagnose one task, or the respondent has not used the product. Use SEQ after a task or UMUX-Lite when two items are the practical limit.
Before you publish
Identify the product version and participant cohort. Ask before a discussion that could influence the ratings.
Keep all ten statements and their polarity. Acknowledge John Brooke’s SUS in published reports; the instrument is © Digital Equipment Corporation, 1986.