Figure 1.
Meta-analysis of infant-directed speech (IDS) preference, modified from http://metalab.stanford.edu. Points show individual studies, with point size showing N. Line shows an inverse-variance weighted local regression.
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.