Table 1. Values of coefficient of variation of movement frequency and motor-related cortical potential features.

Features of the participants			ST	S-DT or C-DT
Coefficient of variation (a.u.)		S−DT group	0.09 ± 0.02	0.10 ± 0.03
		C−DT group	0.10 ± 0.04	0.12 ± 0.04
Amplitude of peak negativity (μV)	C3	S−DT group	−4.65 ± 3.26	−6.49 ± 3.14
		C−DT group	−8.68 ± 6.63	−8.54 ± 4.43
	C4	S−DT group	−4.48 ± 3.89	−5.46 ± 3.30
		C−DT group	−6.29 ± 5.76	−6.50 ± 3.19
Time of peak negativity (ms)	C3	S−DT group	176 ± 124	186 ± 121
		C−DT group	193 ± 94	209 ± 107
	C4	S−DT group	165 ± 156	235 ± 127
		C−DT group	148 ± 120	188 ± 159
Integral value (−2,000 to 0 ms) (μV*ms)	C3	S−DT group	−2,931 ± 5,632	−9,614 ± 10,670
		C−DT group	−8,075 ± 5,408	−7,372 ± 5,435
	C4	S−DT group	−3,716 ± 5,512	−7,198 ± 9,658
		C−DT group	−7,452 ± 6,042	−6,603 ± 4,145

Mean ± standard deviation.

ST: single task; S-DT: simple dual task; C-DT: complex dual task; a.u.: arbitrary units.