Table 2.

Performance Comparison of Proposed Method for Different Numbers of Features in Task I and Task II (in terms of WAcc).

		# Features
		RFE					PCA
		10	60	120	240	500	10	60	120	240	500
WAcc (Task I)	SVM	0.35	0.62	0.76	0.87	0.91	0.36	0.55	0.70	0.81	0.83
	RF	0.52	0.86	0.93	0.94	0.93	0.73	0.94	0.94	0.94	0.95
	GB	0.48	0.80	0.86	0.86	0.88	0.63	0.82	0.90	0.90	0.92
WAcc (Task II)	SVM	0.46	0.65	0.71	0.73	0.79	0.49	0.42	0.42	0.51	0.49
	RF	0.56	0.55	0.55	0.49	0.52	0.55	0.42	0.42	0.51	0.46
	GB	0.55	0.54	0.60	0.54	0.47	0.49	0.44	0.44	0.47	0.46