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.
Stimuli and looking times in all experiments. Newborns' looking time to each of the pairs of stimuli was measured to reveal their preference. Significant differences are indicated by asterisks (*, P < 0.05; **, P < 0.01; ***, P < 0.001). The numbers below the columns represent the number of newborns tested in the corresponding condition.
