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.
Top row: example of one static laugh stimulus, representing the apex of a Duchenne laugh (left) and the same laugh with added vertical wrinkles indicating the eyebrow-lowering frown (right). Bottom row: close up on the vertical wrinkles indicating eyebrow-lowering frowning on the virtual agent.
