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.
Estimated values for correct responses, split by session (initial learning trials versus test trials after 1-week delay) and age cohort (infants versus older) for both species. Estimates are derived from linear mixed models accounting for trial number, session, and age cohort. Error bars indicate 95% confidence intervals for estimates.
