Figure 1. Stimulus examples for global and local target letters E, T, N, and Y with irrelevant letters H, L, X, and Z.
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.