Table 1.

Linear mixed models of maximum display speed on maximum background speed that incorporate within-individual variability. (Model estimates are calculated using restricted maximum likelihood.)

effect	b	d.f.	t	p, one-tailed
Anolis cristatellus (n=16)
intercept	17.05	18.9	6.56	<0.0001
across individuals	0.74	21.9	3.04	0.003
within individuals	0.32	58.8	2.22	0.015
A. gundlachi (n=18)
intercept	14.65	16.7	3.22	0.003
across individuals	0.84	15.0	2.10	0.026
within individuals	0.73	2.29	4.48	0.018