Table 4.

Results of brain component models. All models were run with predictors for a subset of 24 species, for which estimates of all four brain components were available. Hurvich and Tsai's Information Criteria for small sample sizes are used to determine the relative support for each model.

					model
model	predictors	d.f.	F	p	d.f.	F	p	adjusted r2	AICc	ΔAICc	weight
1	Ln niche position	1,21	8.25	0.009	2,21	9.86	0.001	0.44	0.88	0	0.54
	brain stem	1,21	12.02	0.004
2	Ln niche position	1,21	5.03	0.014	2,21	9.10	<0.001	0.43	1.39	0.42	0.44
	telencephalon	1,21	13.81	0.002
3	Ln niche position	1,21	3.15	0.09	2,21	2.99	0.07	0.15	9.75	8.78	0.01
	cerebellum	1,21	0.89	0.36
4	Ln niche position	1,21	4.19	0.053	2,21	2.65	0.09	0.13	10.31	9.34	0.01
	optical lobe	1,21	0.32	0.56