Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Descriptive statistics for usability testing using the System Usability Scale.
| Usability metric | Value |
| Overall System Usability Scale score, mean (SD) | 78.6 (8.2) |
| Ease of navigation, mean (SD) | 4.3 (0.7) |
| Ease of learning, mean (SD) | 4.5 (0.6) |
| Visual design appeal, mean (SD) | 3.9 (0.8) |
| Task completion rate (%) | 92 |
| Error rate (%) | 5.2 |
