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.
A cross-species comparison of the frequency of communicative gestures relative to symbols during the first and the second half of the study. (The bonobo produced two lexigrams in the first 7 months of the study, but, because of the necessary scale of the graphs to capture high frequency categories, they are not visible in the right-hand panel.)
