Coefficient of variation

Definition: The coefficient of variation (CV) is the ratio of the standard deviation of a signal to its mean value. In the context of fNIRS analyses, CV is often used to detect channels with poor signal quality.

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References: https://doi.org/10.1016/j.chemolab.2013.07.007

Related terms: Data quality assessment, scalp coupling index, signal quality metrics, noisy channels, channel rejection, Signal-to-noise-ratio (SNR)