Weiss et al. (2008) working in the area of terror management tested the hypothesis that reminders of their mortality will lead insecure people to move toward conservative positions and secure people to move toward liberal positions. This would not be expected to happen when presented with an aversive stimulus that is unrelated to mortality. They meas- ured participants' "attachment security," and two weeks later presented them with surveys involving aversive events that were related to either mortality or dental pain. The researchers hypothesized that the mortality condition would lead insecure participants to more strongly endorse George W. Bush and secure participants to more strongly endorse John Kerry in the 2004 campaign for President. They predicted that the dental pain condition would not lead to differences between the groups. Assume that Security was coded as a dichotomous variable. What analysis should they use?