Table 4. Classification accuracies of three tasks for various window sizes (used features: mean, delta).

Subjects	Classification accuracies (%)
	0~1 sec	0~1.5 sec	0~2 sec	0~2.5 sec
1	53.3	53.3	60	73.3
2	46.6	53.3	53.3	53.3
3	33.3	46.6	53.3	60
4	43.3	46.6	46.6	46.6
5	40	40	40	40
6	33.3	33.3	33.3	40
7	56.6	60	66.6	66.6
8	60	73.3	76.6	80
mean	45.8 ± 10.2	50.8 ± 12.3	53.7 ± 14.0	57.5 ± 14.9