Table A19.

Results from stepwise regression models for eyes closed alpha activity at electrode Pz.

		Unstandardized Coefficients		Standardized Coefficients
Step	Predictor	B	SE	β	p	R 2	ΔR2	F	p
1	Age	−0.022	0.006	−0.268	<0.0001	0.072	0.072	16.03	<0.0001
2	Age Inattention Hyp/imp	−0.023 0.043 0.044	0.006 0.054 0.055	−0.276 0.065 −0.064	<0.0001 0.423 0.427	0.085	0.013	6.31	<0.0001
3	Age Inattention Hyp/imp Data quality (artifact-free segments in %)	−0.021 0.041 0.031 −0.002	0.006 0.054 0.056 0.001	−0.254 0.062 0.046 −0.077	<0.0001 0.444 0.578 0.285	0.090	0.005	5.03	0.001

N = 208. Hyp/imp = Hyperactivity/impulsivity. SE = standard error of B.