Stuart Benjamin has the goods. Interestingly, Kull et al. omit one very plausible explanation why Kerry supporters are more “correct” than Bush supporters: Kerry simply, by sheer coincidence (or deliberate plotting—nobody fields am opinion poll in which they don’t have some expectation of the marginals), shares the perceived positions of the poll majorities, and there really isn’t much between-group variance on those points.

One might also point out that the question selection seems deliberately designed to elicit “known false” perceptions by Bush supporters and that some of the definitions—for example, “a major WMD program”—are in the eye of the beholder. Indeed, Iraq did have a major WMD program in the 1980s and 1990s, all credible intelligence information suggested that program continued underground in some capacity after UN inspectors left in 1998, there is at least some evidence that elements of that WMD program were transferred to Syria during the 2003 conflict, and it is crystal-clear that Saddam Hussein’s ambitions to have “a major WMD program” were just on hold until the Franco-Russian alliance was able to dismantle the remaining sanctions on Iraq.

Finally, it’s entirely possible the whole exercise captures non-attitudes galore. My 2004 MPSA paper suggests (admittedly, using a model that needs some additional work, once I learn how to do latent class analysis) that perceptions of threat from the Saddam Hussein regime were largely the product of partisan attitudes, rather than having an independent origin.