Fig. 5: Reciprocal helping is not explained by generalized reciprocity at the group level.
From: A cryptic role for reciprocal helping in a cooperatively breeding bird
a,b, Posterior probability distributions (with means and 95% Bayesian credible intervals) for the regression coefficients for reciprocal help and either the sum of helping rates (seconds of helping/seconds of observation) across group members (a) or the mean of helping rates (seconds of helping/seconds of observation) across group members that could have helped (b). Regression coefficients, sample sizes and convergence diagnostics are provided in Extended Data Table 2.
