Extended Data Fig. 5: Nonparametric network permutation tests within nine social groups confirm reciprocal helping.
From: A cryptic role for reciprocal helping in a cooperatively breeding bird
a, Results of Mantel Tests applied to each of nine social groups. Points show Pearson’s correlations between given and received help. b, Results of multiple regression quadratic assignment procedure (MRQAP) with double semi-partialling applied to each of nine social groups. Points show standardized regression coefficients for effect of help given on help received after controlling for effect of kinship. In both plots, dark points with p-values show groups where test was statistically significant, and squares show the mean for the observed statistic across the nine groups with bootstrapped 95% confidence intervals.
