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.
Each participant's percent exposure to female faces. Each point represents one participant. Circles represent 1‐month‐old infant participants and triangles represent 3‐month‐old infant participants. Infants are ordered by age, from youngest to oldest.
