Mental Task Evaluation for Hybrid NIRS-EEG Brain-Computer Interfaces
Topographical maps of the average absolute value of the SVM weights, when trained on NIRS features only. Darker regions are those that are more important when classifying each task pair. Note that distinct color ranges are used for each map. This figure uses the models trained on the one-second window occurring 11 to 12 seconds after stimulus onset, which corresponds to the average peak time for NIRS classification (see Table 4). The pairs are plotted in descending order of average (from left to right and top to bottom) as presented in Table 4.
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