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.
Scale used in subjective evaluation.
| 8 | Un‐noticeable | |
| 7 | Occasionally noticeable | Psychologically discomfort |
| 6 | Constantly noticeable | |
| 5 | Occasionally annoying | |
| 4 | Constantly annoying | |
| 3 | Itchy irritant | Physical discomfort |
| 2 | Concerning pressure | |
| 1 | Hurts | |
| 0 | Painful |
