102
The tone by block interaction was also examined using
paired -t-tests with a Bonferroni correction based on four
comparisons, requiring a P < .0125 for significance. The
SCR for the shock no-shock (mean=21.80, sd=19.89) was
significantly higher than the low tone (mean=10.46,
sd=12.24) for blocks 1 [T(1,46) = -4.655, P < .0001], and
block 4 (shock condition: mean=12.27, sd=19.02; no-shock
condition: mean=4.17, sd=8.48), [T(1,46) = -3.433, P <
.01], but not block 2 (shock condition: mean=12.21,
sd=16.89; no-shock condition: mean=7.46, sd=9.86), [T(1,46)
= -2.264, P = .0284] and block 3 (shock condition:
mean=9.63, sd=14.39; no-shock condition: mean=6.54,
sd=11.59), [T(1,46) = -1.449, P = .1542]. The t-tests are
presented in Table C-28 in Appendix C.
The condition by group interaction was explored using
t-tests with Bonferroni corrections separately for the shock
and no-shock conditions. Since there were not significant
differences between the LH NCS and the RH NCS during the no-
no-shock condition [T(22) = -.257, P = .7995] or the shock
condition [T(22) = -1.338, p = .1946], the two groups were
combined into one control group. Using the bonferroni
correction, the analyses had to reach a p-value of .05/3=
.017 to be considered significant. T-test tables are
provided in Appendix C, Tables C-29 and C-30. During the
shock anticipation, the RHD patients (mean=5.15, sd=8.55)
had significantly smaller responses then the CONS