Table 2.

Inter-observer reliability. SPT values obtained on 6 rats by 2 investigators.

Rat	Frequency (Hz)	Investigator #1 SPT value (mA)	Investigator #2 SPT value (mA)	Difference SPT value (mA)
1	250	0.28	0.27	0.01
	5	0.21	0.22	0.01
2	250	0.29	0.30	0.01
	5	0.36	0.32	0.04
3	250	0.27	0.27	0
	5	0.21	0.22	0.01
4	250	0.26	0.27	0.01
	5	0.16	0.17	0.01
5	250	0.36	0.35	0.01
	5	0.20	0.18	0.02
6	250	0.27	0.28	0.01
	5	0.17	0.18	0.01

The differences of SPT values between two investigators were analyzed by using Wilcoxon matched pairs signed rank sum tests: p = 0.41