. 2016 Feb 3;3(2):150459. doi: 10.1098/rsos.150459

Table 1.

Best linear model (AICc =7.781) explaining yawn contagion frequency as a function of the social bond between yawn trigger and responder (F=3.938, d.f. 1=2, d.f. 2=88, p=0.023) and receiver’s sex (F=7.371, d.f. 1=1, d.f. 2=88,p=0.008). Intercept result: F=4.751, d.f. 1=3, d.f. 2=88,p=0.004.

factors	coefficient	s.e.	t	significance level	confidence interval 95%
intercept	0.491	0.045	10.917	0.000	0.402/0.581
social bond (1)	−0.147	0.052	−2.802	0.006	−0.250/−0.043
social bond (2)	−0.093	0.078	−1.200	0.233	−0.247/0.061
social bond (3)	0.000^a
responder’s sex (f)	0.132	0.049	2.715	0.008	0.035–0.229
responder’s sex (m)	0.000^a

^aRedundant coefficients.