Table 4 The results of linear mixed-effects models on temporal lag between vertical jaw maxima and vertical upper lip minima

	Estimate	SE	df	t value	Pr(>|t|)
(intercept)	-0.47	0.22	11.92	-2.17	p>0.05
Speech rate [fast]	-0.40	0.16	189.41	-2.55	p<0.05
Boundary[within-word]	1.69	0.16	190.61	10.79	0<0001

Note: Number of observations: 196. Groups: subject, 7.