Table 3. Analysis of Reading speed.

	Main effects model					Final model
Effect	Estimate	Std. Err.	DF	t Value	p value	Estimate	Std. Err.	DF	t Value	p value
Intercept	−3.21	0.75	196	−4.3	<.0001	−3.69	0.78	241	−4.74	<.0001
method	−0.02	0.06	191	−0.39	0.6984	1.04	0.53	188	1.97	0.0508
VA Span	0.02	0.12	195	0.21	0.8351
SW	0.03	0.01	194	3.34	0.001	0.03	0.01	195	3.37	0.0009
PD	0.04	0.01	194	3.84	0.0002	0.05	0.01	232	4.45	<.0001
method*PD						−0.01	0.01	189	−2.02	0.0451

Notes to Table 3: N(subjects)  = 103; N(observations)  = 387. Whereas there was no significant interaction between method and SW in the full dataset, such an interaction was present when the analysis was restricted to only the level 7 texts.