Table 2. Test-retest reliability of k-means clustering analysis and 19- and 8- electrode montages across 3 sessions separated by at least 48 hours.

Feature/Microstate		K-means, 30 electrodes, Global Maps			TAAHC, 19 electrodes, Global Maps			TAAHC, 8 electrodes, Global Maps
		Mean	α	SEM	Mean	α	SEM	Mean	α	SEM
Average Lifespan (ms)	A	92.36±8.49	0.782	5.90 (6.39%)	92.35±11.17	0.873	6.39 (6.92%)	94.27±9.60	0.864	5.62 (5.97%)
	B	95.03±9.40	0.901	4.79 (5.05%)	96.26±12.77	0.917	6.03 (6.27%)	92.58±10.34	0.918	4.93 (5.32%)
	C	100.53±16.79	0.945	6.71 (6.68%)	105.42±23.59	0.955	8.61 (8.17%)	105.59±15.25	0.924	6.98 (6.61%)
	D	110.36±10.30	0.428	9.27 (8.40%)	102.19±12.29	0.680	9.59 (9.38%)	100.48±17.48	0.957	6.23 (6.20%)
	All	101.13±9.65	0.795	6.52 (6.45%)	100.20±13.96	0.898	7.24 (7.23%)	99.15±12.19	0.940	5.05 (5.10%)
Frequency (appear/sec)	A	2.22±0.37	0.853	0.22 (9.88%)	2.40±0.54	0.792	0.36 (15.06%)	2.58±0.54	0.893	0.28 (10.76%)
	B	2.23±0.29	0.786	0.20 (9.09%)	2.43±0.42	0.879	0.23 (9.58%)	2.44±0.40	0.934	0.17 (7.09%)
	C	2.51±0.37	0.886	0.20 (8.05%)	2.69±0.39	0.801	0.26 (9.75%)	2.70±0.46	0.929	0.20 (7.50%)
	D	3.03±0.49	0.901	0.25 (8.30%)	2.67±0.60	0.936	0.26 (9.63%)	2.52±0.36	0.898	0.19 (7.43%)
	All	9.98±1.04	0.759	0.74 (7.44%)	10.19±1.61	0.840	0.99 (9.75%)	10.24±1.29	0.920	0.61 (5.93%)
Coverage (%)	A	20.27±2.42	0.778	1.67 (8.25%)	21.72±2.67	0.807	1.67 (7.67%)	23.97±3.60	0.740	2.64 (10.99%)
	B	21.03±2.66	0.887	1.42 (6.73%)	23.10±3.88	0.929	1.69 (7.31%)	22.39±3.18	0.892	1.69 (7.57%)
	C	25.47±6.60	0.980	1.63 (6.40%)	28.29±7.27	0.969	2.24 (7.92%)	28.33±5.42	0.923	2.46 (8.70%)
	D	33.23±5.08	0.939	2.13 (6.41%)	26.89±4.89	0.946	1.94 (7.21%)	25.31±6.04	0.973	1.72 (6.78%)

Results of analysis of microstate time series for average lifespan, frequency, and coverage fraction of each microstate. Mean parameter values are presented±standard deviation. α =  Cronbach's α, SEM  =  standard error of measurement.