107

 5.09, P <.0001] revealed that on average subjects reported

 feeling more aroused during the shock compared to the shock-

 control trials (shock, mean=3.30, sd=1.28; shock-control,

 mean=4.65, sd=.754). There was also a main effect for

 dominance [Z = -5.03, P < .001]. Examination of means

 indicate that subjects reported feeling less in control

 during the shock compared to the shock-control trials

 (shock, mean=4.08, sd=1.18; shock-control, mean=4.67,

 sd=.804).

 The Kruskal-Wallis Tests revealed that there were no

 group differences for ratings of valence, arousal, and

 dominance for both the shock and control trials. These

 results are presented in Table C-39 of Appendix C.

 In sum, overall subjects reported that during shock

anticipation they experienced more unpleasantness, more

arousal, and less control than during the no-shock

anticipation. Additionally, the RHD, LHD, and NCS groups

did not differ in the intensity of their ratings in both the

shock and no-shock conditions.

Reward task

 As mentioned above, subjects were given the choice of

receiving dollar bills, scratch-off Florida lottery tickets,

or a combination of both dollars and tickets in this task.

Subjects were instructed that each time they heard the

reward tone, they would receive 1 dollar or 1 ticket

(depending on what they chose). After each 10-trial block,