Fig. 1.

Influence of the interaction between male dominance rank and the strength of mother-male friendship on the probability of affiliation of an infant towards a male. The plane depicts the predicted values calculated by the GLMM with each grid representing the mean value per square of the predicted mixed model. Circles represent empirical mean affiliation value per square and the size of the circles is proportional to the number of data points. The filled circles depict the data points that exceed the estimated value, and the open circles depict the data points that fall below the estimated values