Table III.

Inconsistencies between rankings derived by using Elo-rating under different assumptions and the directionality of pant-grunt vocalisations, using data from male chimpanzees (Pan troglodytes) of the Sonso community, Budongo Forest, Uganda, collected between October 2003 and August 2004

Model	Analysis	No. of inconsistencies (no. of dyads)	Difference in Elo-rating (mean ± SD)
a	Unmodified (Neumann et al. 2011)	14 (9)	154.64 ± 103.60
b	Prior historya with linear relationship	2 (2)	103.00 ± 97.58
c	Prior historya with negative exponential	3 (3)	93.33 ± 32.62
d, e	Prior historyb with negative exponential + intensity of aggression (variable K)	1 (1)	139.00

Difference in Elo-rating is the mean of the differences between members of dyads where ranks were inconsistent with the direction of pant-grunting

^aPrior history of social dominance as ordinal ranks

^bPrior history of social dominance as either ordinal (model d), or ordered categorical (model e), ranks