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. Author manuscript; available in PMC: 2019 May 2.
Published in final edited form as: Neuroimage. 2018 Aug 17;183:327–335. doi: 10.1016/j.neuroimage.2018.08.020

Fig. 4.

Fig. 4.

Signal correlation for different referencing methods. (A) Correlation matrix from Subject 12 for the six referencing methods: (a) monopolar; (b) GWR; (c) CAR; (d) ESR; (e) bipolar; and (f) Laplacian. Colors correspond to the correlation between two specific channels. The correlation between channels varies across the methods. (B) Average Pearson's correlation and standard error for the six referencing methods. Asterisks denote the significance of the difference between correlations established using paired t-tests: *** (p < 0.001), ** (p < 0.01). These statistical results are shown only for the nearest pairs that show a significant difference.