Table 1.

Performance was largely unaffected by interpulse interval for double-pulse trials with equal pulse strength and with unequal pulse strength

Subjects	Equal strength		Unequal strength
	β3	β4	β3	β4	β5
S1	−0.52 ± 0.40 (p = 0.18)	5.1 ± 6.3 (p = 0.41)	0.26 ± 0.51 (p = 0.61)	−0.25 ± 4.0 (p = 0.95)	−2.0 ± 4.1 (p = 0.63)
S2	−0.59 ± 0.38 (p = 0.12)	4.5 ± 5.4 (p = 0.41)	−0.001 ± 0.48 (p = 0.99)	3.8 ± 3.6 (p = 0.29)	−3.1 ± 3.8 (p = 0.42)
S3	−0.75 ± 0.38 (p = 0.05)	9.5 ± 5.3 (p = 0.07)	0.33 ± 0.50 (p = 0.51)	6.5 ± 3.9 (p = 0.09)	−8.1 ± 3.9 (p = 0.04)
S4	0.27 ± 0.44 (p = 0.54)	−3.1 ± 6.1 (p = 0.61)	−0.28 ± 0.54 (p = 0.60)	0.70 ± 4.1 (p = 0.87)	4.4 ± 4.3 (p = 0.31)
S5	0.39 ± 0.41 (p = 0.35)	−4.4 ± 5.6 (p = 0.43)	0.01 ± 0.51 (p = 0.99)	1.3 ± 4.0 (p = 0.75)	−0.52 ± 4.0 (p = 0.90)

Each row shows the coefficients of Equation 3 (mean ± SE) and their associated p values.