3.2.2 Test-Retest Reliability
Measures of reliability derived from test-retest reliability indicated that the STP (baseline-to-peak) approach produced reliable measures of amplitude, with coefficient values between .87 and .91 compared to .60 and .94 for the STW approach. The values were higher for the STP approach than the STW approach for all components except P2 and N2, which were both close in value (Table 8). Latencies for the STP approach yielded values between r = .64 and r = .74.