Table 2.

Results of models regressing laterality indexes on main effects and corresponding interaction effects

	B	SE	β	R2	ΔR2	ΔF
Model A(n = 161)
Step 1				.104	–	9.13***
EHI	0.12	0.04	0.22**
Side of seizure focus	−15.39	5.09	−0.23**
Step 2				.161	.058	10.82***
EHI × side of seizure focus	0.26	0.08	0.37***
Model B (n= 159)
Step 1				.059	–	4.86**
EHI	0.11	0.04	0.20**
Age at onset	0.32	0.21	0.12
Step 2				.113	.054	9.44**
EHI × age at onset	−0.01	0.01	−0.23**
Model C (n= 159)
Step 1				.054	–	4.48*
EHI	0.12	0.04	0.23**
Familial sinistrality	2.46	5.29	0.04
Step 2				.075	.021	3.51†
EHI × familial sinistrality	−0.15	0.08	−0.21†
Model D (n = 160)
Step 1				.071	–	6.01**
Side of seizure focus	−15.95	5.29	−0.23**
Age at onset	0.35	0.21	0.13
Step 2				.073	.002	0.35
Side of seizure focus × age at onset	0.26	0.43	0.07
Model E (n = 160)
Step 1				.059	–	4.90**
Side of seizure focus	−16.76	5.40	−0.24**
Familial sinistrality	0.25	5.37	0.01
Step 2				.059	.001	0.02
Side of seizure focus   × familial sinistrality	−1.44	10.85	−0.02
Model F (n = 158)
Step 1				.020	–	1.58
Age at onset	0.37	0.22	0.13
Familial sinistrality	3.70	5.49	0.05
Step 2				.020	.001	0.01
Age at onset × familial sinistrality	−0.02	0.45	−0.01

Note. EHI = Edinburgh Handedness Inventory;

^*p < .05;

^**p < .01;

^***p < .001;

^†p = .06