Table 2.

Summary of NSSI under all conditions tested

	Frequency contrast
	Δf = 0.37 (mean ± SD)	Δf = 0.1 (mean ± SD)	Δf = 0.04 (mean ± SD)
90/10%
2 Hz	n = 63 (0.33 ± 0.28)	n = 73 (0.16 ± 0.24)	n = 28 (0.06 ± 0.09)
Range	−0.09 to 0.93	−0.53 to 0.92	−0.06 to 0.39
4 Hz	n = 69 (0.46 ± 0.32)	n = 122 (0.31 ± 0.35)	n = 71 (0.17 ± 0.25)
Range	−0.1 to 0.99	−0.43 to 0.98	−0.22 to 0.88
8 Hz	n = 36 (0.45 ± 0.35)	n = 43 (0.30 ± 0.36)	n = 17 (0.17 ± 0.30)
Range	−0.16 to 0.97	−0.28 to 0.97	−0.08 to 0.76
70/30%
4 Hz	n = 24 (0.20 ± 0.19)	n = 25 (0.12 ± 0.22)	n = 8 (0.02 ± 0.05)
Range	−0.01 to 0.83	−0.14 to 0.89	−0.02 to 0.13