Table 2.

Spearman correlation coefficients for the relationship between test-retest reliability based on artifact-free data and included number of artifact-free segments.

Measure	rho	p-value
Spectrum	0.36	0.005
Direct causality	−0.16	0.23
Transfer function	0.45	0.0003
Transfer function polynomial	0.29	0.02
Real valued coherence	0.30	0.02
Complex coherence	0.28	0.03
Partial coherence	0.53	0.00001
Partial directed coherence	0.12	0.36
Partial directed coherence factor	0.10	0.44
Generalized partial directed coherence	0.43	0.0007
Directed transfer function	−0.01	0.95
Direct directed transfer function	0.50	0.00004
Full frequency directed transfer function	0.37	0.0032
Geweke's Granger causality	−0.04	0.78

Number of artifact-free segments was averaged across two sessions. P-values are uncorrected. Bold font indicates significance at the Bonferroni-corrected level p < 0.0036.