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.
Search displays corresponding to the three tasks. Experimental displays were presented on a black background. On the left, participants searched for a red (solid) vertical rectangle among green (outline) vertical rectangles (Feature search). In the middle, participants searched for a red vertical rectangle among green vertical and red horizontal rectangles (Conjunction Search). On the right, participants searched for a digital 2 among digital 5s (Spatial Configuration Search).
