Table 3.

Frontal Alpha Asymmetry Reliability for Lights-Off EEG Segments.

	8-Months		12-Months		18-Months
	Split- Half r	Cronbach’s alpha	Split- Half r	Cronbach’s alpha	Split- Half r	Cronbach’s alpha
N	108	108	67	67	69	69
Mean	0.68	0.78	0.74	0.84	0.66	0.82
SD	0.18	0.38	0.16	0.12	0.31	0.10
Median	0.70	0.83	0.79	0.88	0.74	0.85
Min	−0.59	−2.93	0.14	0.25	−1.00	0.28
Max	0.99	1.00	0.96	0.98	0.93	0.97

Notes: Split-half average correlations are based on 100 random splits within each subject’s segment-by-segment data and then averaged across the sample (N).