Table 6.

Summary of regression for IQ, hyperactivity, impulsivity, and inattention on Corsi Blocks.

	Variable	b	SEb	β	t	R2	R2 change	Semi-partial correlation
Step 1						0.129	0.129∗∗
	IQ	0.060	0.016	0.359	3.708ˆ**
Step 2						0.138	0.009
	IQ	0.062	0.016	0.368	3.781ˆ**			0.366
	Hyperactivity	-0.016	0.016	-0.094	-0.966			-0.094
Step 3						0.175	0.038∗
	IQ	0.058	0.016	0.344	3.566ˆ**			0.340
	Hyperactivity	0.020	0.024	0.121	0.851			0.081
	Impulsivity	-0.058	0.029	-0.289	-2.035ˆ*			-0.194
Step 4						0.179	0.004
	IQ	0.060	0.107	0.357	3.605ˆ**			0.344
	Hyperactivity	0.025	0.025	0.151	1.001			0.096
	Impulsivity	-0.052	0.031	-0.256	-1.685			-0.161
	Inattention	-0.014	0.023	-0.085	-0.620			-0.059

^∗p < 0.05, ^∗∗p < 0.001.