Bearable Defection by Group.

To measure responses to defection in the PD, we defined a bearable defection (BD) index as the maximum defects one receives in the PD from a partner before switching from cooperation to defection. This index reflects the bi component of sociality, the ability to tolerate defection. Across all experiments (6 experiments with socialization treatment) and summing up BD indexes of participants of Type 2 and Type 3 (because the other types did not switch their strategy) there is a visible increase in tolerance for defection with socialization:BD (People) = 87 Bearable Defection by Group.