1.13, sd=1.45), RH NCS (mean=-1.94, sd=2.20). A table of

the t-tests, Table C-9, is presented in Appendix C.

 Post-hoc analyses of the group by block interaction

 were performed. T-tests with Bonferroni corrections were

 conducted to compare the groups separately for each block.

 As mentioned above, the LH NCS and the RH NCS were combined.

 Using the Bonferroni correction of p < .017 for

 significance, no significant differences between groups were

 revealed during blocks 1, 3, and 4. However, during block

 2, the LHD subjects had a greater D1 [T(1,22) = -2.62, P

 <.017], (mean=-3.42, sd=2.64) compared with the RHD subjects

 (mean=-1.23, sd=1.16), but not the CONs [T(1,33) = -2.10, P

 = .043]. Tables of the t-tests for each block, Table C-10,

 C-ll, C-12, and C-13, are presented in Appendix C. The

 means for each group for each block are presented below.

 Table 4-2 Means and Standard Deviations of D1 during the
 Control Trials of the Shock Condition

 Block Block Block Block
 One Two Three Four

 LHD -1.0583 -3.417 -3.050 -1.683
 (1.987) (2.638) (3.206) (1.716)

 LH NCS -1.718 -1.063 -.945 -.800
 (.745) (1.943) (1.662) (1.202)

 RHD -1.483 -.850 -1.875 -.4000
 (1.206) (1.141) (1.475) (2.072)

 RH NCS -2.342 -2.175 -1.025 -2.225
 (2.807) (2.406) (1.716) (1.644)

 As with Dl, a repeated measures ANOVA was conducted

using group as the between-subjects factor and block and