Table 1 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)		0.97		0.98
Residual				2.46		1.57
a.ii. Fixed effects: Null model (Speech rate)
	Estimate		SE		t-value
(Intercept)	-15.33		0.40		-38.48
Speech rate [fast]	-0.54		0.21		-2.56
b.i. Random effects: Null model (Boundary)
Groups	Name		Variance		SD
Subject	(Intercept)		0.96		0.98
Residual			2.45		1.57
b.ii. Fixed effects: Null model (Boundary)
	Estimate		SE		t-value
(Intercept)	-15.88		0.40		-39.84
Boundary [within-word]	0.56		0.21		2.68
Full model c.i. Random effects: Full model (Speech rate + Boundary)
Groups	Name		Variance		SD
Subject	(Intercept)		0.96		0.98
Residual			2.37		1.54
c.ii. Fixed effects: Full model (Speech rate + Boundary)
	Estimate		SE		t-value
(Intercept)	-15.61		0.41		-38.00
Speech rate [fast]	-0.54		0.21		-2.62
Boundary [within-word]	0.57		0.21		2.74