Table 2. Comparison of performances for different number of electrodes.

ML algorithm	FC5-FC6			AF3-AF4, FC5-FC6			AF3-AF4, F7-F8			F7-F8, FC5-FC6
	ACC	SP	SE	ACC	SP	SE	ACC	SP	SE	ACC	SP	SE
LDA	87.4	100	78	93.3	100	98	98.1	100	98	98.1	100	98
QDA	94.7	100	98	92.0	100	96	98.3	100	100	100	100	100
Linear SVM	86.3	100	76	90.8	100	95	98.3	100	100	100	100	100
Quadratic SVM	83.1	100	96	91.5	100	98	98.3	100	99	100	100	100
Gaussian SVM	87.2	100	80	93.3	100	97	98.3	100	98	100	100	100
KNN	85.6	100	84	93.3	100	100	99.3	100	100	100	100	100

ACC: Accuracy, SP: Specificity, and SE: Sensitivity

AF: Anterior Frontal, F: Frontal, FC: Fronto-Central