Table 1.

Correlation between trial-to-trial power fluctuations of awareness- and attention-related gamma-band activities at the single-subject level

010203040506070809101112
n (active)544469432532412319344341388393381504
Spearman's ρ+0.03+0.04+0.06−0.04−0.01+0.03+0.03+0.04+0.02+0.05+0.09+0.00
p value0.460.340.220.390.810.590.610.420.660.360.080.94
SignificanceNSNSNSNSNSNSNSNSNSNSNSNS
  • For subjects 01–12, we computed the Spearman's rank correlation test between the trial-to-trial power fluctuations of the awareness-related mid-frequency gamma-band activity (54–64 Hz, 240–500 ms after stimulus, awareness-related ROI) and the attention-related high-frequency gamma-band activity (76–90 Hz, 350–500 ms after stimulus, attention-related ROI). The number of active samples (n), the Spearman's rank correlation coefficient (ρ ), the two-tailed p value, and the corresponding significance level are shown for each subject. None of the 12 subjects showed a significant correlation between the power fluctuations of awareness- and attention-related gamma-band activities at the single-trial level (mean ρ = +0.03, d.f. ≈ 440, mean p = 0.49, NS).