Figure 8.
Aggregation level of rovers or sitters (number of rovers or sitters present in the most crowded group/total number of rovers or sitters) as a function of their proportion in a group of 20 individuals (n = 18, mean ± s.e.m.).
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.