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.
Example kernel density estimates (averaged across time) corresponding to the clips shown in Figure 1. Rows are data from (top to bottom) 3-month-olds, 6-month-olds, 9-month-olds, and adults. Warmer colors indicate higher probability; probabilities are scaled equally across all images.
