Table 2.

LHR tests for correlated evolution between cooperative breeding and four intrinsic traits. Ind., independent; Dep., dependent; LH, likelihood; LLH, log likelihood; LLHR, log likelihood ratio; Coop, cooperative breeding; Non, non-cooperative breeding.

trait	Ind. LL	Dep. LL	LLRa	p-value	root posterior probabilityb
habitat	−79.15	−80.41	−2.51	0.64	0.5 (Coop, humid forest)
primary diet	−74.03	−71.37	−5.32	0.26	0.5 (Non, faunivore)
territoriality	−81.57	−74.69	−13.76	0.008	0.5 (Coop, territorial)
body mass	−72.92	−70.69	−4.46	0.35	1.0 (Coop, large)

^aLLHR tests compared a model in which evolution of cooperative breeding is independent of a given trait with a model in which it is dependent on that trait, based on the differences in maximum LLH values between models (2 × LH Ind. model − LH Dep. model). p-values were calculated from χ²-distributions of the LLHR, with degrees of freedom equal to the difference in number of parameters estimated [43].

^bValues approaching 1.0 have strong support.