237 Table C-71 ANCOVA Table of Percentage of SCR Responses comparing Shock and Reward Tasks with Medication as a Covariate ss. DF SS F Sig of F Within and Residual (Group) 6045.49 42 143.94 Regression 17.95 1 17.95 . 12 .726 Group 2266.16 3 755.39 5.25 . 004 Within and Residual (Tone) 5202.84 43 121.00 Tone 1996.37 1 1996.3 7 16.50 . 000 Tone by Group 1021.63 3 340.54 2.81 . 050