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

<table>Normalized weights associated to each electrode of the considered electrodes
montage calculated using the Common Spatial Patterns method. Most of the
subjects show a dominant activation localized over the O1-Oz-O2 electrode
positions and, according to the weight signs, the optimal filter is usually a
bipolar derivation possibly reinforced by parietotemporal activations.</table>

Computational Intelligence and Neuroscience

fig6

Figure 6

Figure 6: 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 6 | 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 