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.
Example of a moving window on three consecutive fixations. The asterisk represents the position of the eye. In this example, the window is asymmetrical and shows 4 character positions to the left and 10 character positions to the right of fixation.
