Extended Data Fig. 6: Reciprocal helping is not driven by kinship (shown with regression coefficients for kinship effect).
From: A cryptic role for reciprocal helping in a cooperatively breeding bird
Posterior probability distributions (with means and 95% Bayesian credible intervals) are shown for the regression coefficients for reciprocal help as a predictor of helping when adjusting (statistically controlling) for kinship. Estimates are shown for all helpers (circles, violet), including individuals of unknown dispersal history, as well as for male (blue) and female (red) helpers that are residents (triangles) or immigrants (squares). Estimates of the coefficients for kinship as a predictor of helping when adjusting for reciprocal help (grey) should not be interpreted as measures of kin-biased helping, because they exclude pairs where reciprocal help was impossible (e.g., all resident females), and exclude any possible effect of kinship causing help through reciprocal help among kin. Regression coefficients, sample sizes, and convergence diagnostics are provided in Extended Data Table 2.
