Comparing the Performance of Popular MEG/EEG Artifact Correction Methods in an Evoked-Response Study

Figure 5

Signal-to-noise ratios (SNR) achieved by applying artifact correction based on Independent Component Analysis (ICA) or Signal Space Projection (SSP). Tukey box plot showing the SNR levels achieved by applying the ICA or SSP method in the signal amplitude peak channel of the EEG, magnetometers (Mag.), and gradiometers (Grad.) (the SNR shows the relationship between the signal and noise level in single trials). Outliers more than 1.5 (circles) or 3.0 (stars) interquartile ranges from the edge of the 50% of the cases are denoted with circles or stars, and case numbers are provided for each outlier.