Comparison of classification accuracies of unimodal BCI (EEG or NIRS) and the HYB.

<p>Each circle indicates the individual result. Blue and red circles refer to the performance of EEG vs. HYB and NIRS vs. HYB, respectively. Note that the circles above the diagonal line indicate that the individual classification accuracy improved by HYB. Percentage values show the ratio of the number of improved individual classification accuracies by HYB over the total number of participants.