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.
Areas of interest (AOIs)/eye-tracking: the figure shows a sample article where the AOIs, associated with the advertising spaces, are highlighted in red. The third ad, placed in a bottom fixed position, was always visible while scrolling. The AOIs position and dimension were the same for both article formats (display and native).
