Table 2 Results of linear mixed effects modelsNote: Number of observations: 223. Groups: subject, 7

Null model a.i. Random effects: Null model (Speech rate)
Groups	Name	Variance	SD
Subject	(Intercept)	7.83	2.80
Residual		2.94	1.72
a.ii. Fixed effects: Null model (Speech rate)
	Estimate	SE	t-value
(Intercept)	-0.01	1.07	-0.01
Speech rate [fast]	-0.19	0.23	-0.83
b.i. Random effects: Null model (Boundary)
Groups	Name	Variance	SD
Subject	(Intercept)	7.83	2.80
Residual		2.85	1.69
b.ii. Fixed effects: Null model (Boundary)
	Estimate	SE	t-value
(Intercept)	-0.42	1.07	-0.40
Boundary [within-word]	0.63	2.23	2.80
Full model c.i. Random effects: Full model (Speech rate + Boundary)
Groups	Name	Variance	SD
Subject	(Intercept)	7.83	2.80
Residual		2.84	1.69
c.ii. Fixed effects: Full model (Speech rate + Boundary)
	Estimate	SE	t-value
(Intercept)	-0.33	1.08	-0.30
Speech rate [fast]	-0.19	0.23	-0.86
Boundary [within-word]	0.63	0.23	2.81