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.
Distribution of usability problems by problem type and severity per TA method.
| Problem type | Total | CTA/RTA (n = 8) Severity | CTA unique (n = 7) Severity | RTA unique (n = 3) Severity | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CTA | RTA | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 | |
| Visibility problems | 3 | 2 | 1 | 1 | 1 | 1 | ||||||||
| Overall ease of use | 1 | 2 | 1 | 1 | ||||||||||
| Errors/ help instructions | 1 | 1 | 1 | |||||||||||
| Terminology interpretation problems/meaning of labels | 4 | 2 | 1 | 1 | 2 | |||||||||
| Unclear graphics/symbols | – | 1 | 1 | |||||||||||
| Navigation | 6 | 3 | 2 | 1 | 3 | |||||||||
| Total | 15 | 11 | 4 | 4 | 1 | 5 | 1 | 3 | ||||||
