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.
Two children were seated side by side in front of a computer screen and two tappers. A divider was placed on the screen so that each child could only see his or her half of the screen. The other child and his or her tapper were visible to each participant. The shaded area represents the field of view of one of the participants.
