Table 3 Correlations are specific to the alpha bump

From: Fluctuations in instantaneous frequency predict alpha amplitude during visual perception

Correlation (mean ± SD)

PaANoise

PaAShuffled

PaA1/f

PaAEmpirical

Correct

−3.35*10−20 ± 9.2*10−16

−0.0173 ± 0.1209

−0.0624 ± 0.0948

*0.4745 ± 0.0728, p = 0

Incorrect

4.08*10−20 ± 6.8*10−16

−0.0183 ± 0.1318

−0.0594 ± 0.1045

*0.4802 ± 0.0736, p = 0

  1. Control look-up table analyses were performed to generate PaAnoise, PaAshuffled, and PaA1/f, which were then correlated with amplitude (see Methods). Average correlation coefficients ± standard deviations are shown for all analyses. PaAnoise was generated with a series of white noise spectra as look-up-tables, producing small correlations with amplitude indistinguishable from 0. PaAshuffled was generated by repeatedly shuffling the frequency axis of a given look-up-table, but again PaAshuffled was uncorrelated amplitude. PaA1/f was generated with look-up-tables captured the 1/f component but did not contain the characteristic alpha bump. PaA1/f was also uncorrelated to the empirically observed alpha amplitudes. *indicates significance of empirically obtained PaA values, computed by comparing t-tests against zero of these values to t-tests the shuffled PaA values, and then FDR correcting at P = 0.05
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