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.
4-point Likert scale questionnaire for comparison between black line transitions and blurred transitions.
| Black lines\blurring marking the transition between images, do not strain your eyes during navigation. |
|
| Black lines\blurring marking the transition between images, do not disturb navigation. |
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