Research Article

Virtual and Actual Humanoid Robot Control with Four-Class Motor-Imagery-Based Optical Brain-Computer Interface

Figure 9

Confusion matrices for the two subjects showing the most improvement between the virtual and DARwIn-OP online BCI results. The confusion matrices indicate different strategies for improving accuracy during DARwIn-OP control: S1 shows a mostly diagonal pattern while S6 shows a focus on correct classification of the two hand tasks.