110 The percentage of responses where the response was greater than .02 micro sieman was analyzed using a repeated measures analyses of variance (ANOVA) with group (RHD, RH NCS, LHD, LH NCS) as the between subject factor and tone (high, low) was the within subject factor. There was no main effect for group [F (3,43) = .478, P = .700] or for tone [F(l,43) = .562, P = .457]. The interaction between group and tone was also not significant [F(3,43) = 1.86, P = .151]. The mean number of responses for each group (in percentages) are as follows: LHD mean=15%, sd=23.45; LH NCS mean=14.38%, sd=27.75; RHD mean=10.23%, sd=15.00; RH NCS mean=20.63%, sd=15.13. See Table C-44 for the full ANOVA table in Appendix C. Arcsin transformations were also calculated and analyzed using the same design. The transformed data also revealed no significant results. A repeated measures ANOVA was used to analyze the SCR. The between subjects factor was group (LH, LH NCS, RH, RH NCS) and the within subject factors were tone (high and low) and block (1 to 4). Examination of SCR revealed a main effect for block [F(3,43) = 2.84, P < .05] along with a block by condition interaction [F(3,43) = 3.32, P < .05]. The full ANOVA table, Table C-45, is presented in Appendix C. Paired t-tests with a Bonferroni correction requiring P < .008 to reach significance were employed to explore the main effect of block. None of the block were significantly