Figure 1
From: Selective and contagious prosocial resource donation in capuchin monkeys, chimpanzees and humans
Prosocial responses of chimpanzees, humans and capuchins.
The Y-axis represents the proportion of MPR pulled by the Proposer for the Receiver and the bars are marginal mean and standard deviation estimated from the statistical model. Graphs column 1, MPR for Proposer; column 2: LPR for Proposer. Empty (E) = Receiver absent; Prosocial (P) = Receiver present; Self (S) = Self-centered scenario, Receiver absent and Proposer access to Receiver compartment rewards. Blue chart bars = significantly different to Empty condition. Green-framed graphs indicate a significant prosocial response (Prosocial > Empty). Drawings by Jason Zampol.
