A Robust and Self-Paced BCI System Based on a Four Class SSVEP Paradigm: Algorithms and Protocols for a High-Transfer-Rate Direct Brain Communication
Figure 7
Weights associated to each electrode of the considered electrodes montage
using the manual channels combining approach described in Section 2.2.2. Positive
weights refer to positive-contribution electrodes, while negative
weights refer to negative-contribution electrodes.