Fig. 8.

The estimated impact of honesty and loyalty. The estimated proportion of rounds that could have resulted in mutual cooperation had all human players followed S#’s learned behavioral and signaling strategies of not deviating from cooperative behavior when mutual cooperation was established (i.e., Loyal) and keeping verbal commitments (i.e., Honest), and all other behavior from the players remained unchanged. See Supplementary Note 7 for details of methods used. Error bars show the standard error of the mean