Table 3. The classification accuracies of each piece after applied to OVO in the Classification of multi-class EEG signals using Random Forests classifier with 5-FCV (the second approach).

The obtained piece after OVO	The obtained Classification accuracy (%)
Class 1-Class 2	96.90
Class 1-Class 3	98.30
Class 1-Class 4	98.20
Class 1-Class 5	99.80
Class 2-Class 3	64.10
Class 2-Class 4	95.60
Class 2-Class 5	90.70
Class 3-Class 4	94.50
Class 3-Class 5	91.40
Class 4-Class 5	81.30
The overall accuracy (average score)	91.08