spectral_connectivity.statistics.coherence_bias

coherence_bias(n_observations)

Estimates of coherence are biased by sample size [1,2]. This estimates the degree of bias so that estimates can be corrected.

Parameters:

n_observations (int) – Number of observations.

Returns:

bias

Return type:

float

References

[1]

Enochson, L.D., and Goodman, N.R. (1965). Gaussian approximations to the distribution of sample coherence (Measurement analysis corp Los Angeles CA).

[2]

Bokil, H., Purpura, K., Schoffelen, J.-M., Thomson, D., and Mitra, P. (2007). Comparing spectra and coherences for groups of unequal size. Journal of Neuroscience Methods 159, 337–345. 10.1016/j.jneumeth.2006.07.011.