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.
Four stimulus types, (1) target at pop-out position with a distracter containing the target letter feature; (2) target at pop-out position with a distracter without the target letter feature; (3) non-target at pop-out position with a distracter containing the target letter feature; (4) non-target at pop-out position with a distracter without the target letter feature.
