Figure 3.

Average accuracy of controlling each home appliance using P300-based BCIs without balancing as well as various over-, and undersampling techniques for balancing. See the text for details. Accuracy for controlling for each home appliance as well as total accuracy is shown: (A) door lock, (B) electric light, (C) Bluetooth speaker, and (D) sum of them. Red vertical bars denote standard error of mean and * marks denote statistical significance (p < 0.05), and ** mark denote statistical significance (p < 0.005).