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.
An example stimulus for an approximate number task, where participants must rapidly decide if there are more black or red dots. The areas, min sizes, and max sizes between the dots are controlled, and the dots are intermixed in order to discourage strategies based on area.
