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.
Each participant was asked to complete both pop-out and serial visual search tasks three times daily [at any time between the set periods 6am to 12 noon (T1), 12 noon to 6pm (T2), and 6pm to 6am the following day (T3)] for fourteen days. An expanded time sequence is shown for the third day of the schedule.
