Ouch. I’ve often thought that today’s conservatives weren’t the brightest bulbs on the whole, and wondered whether there was some causal link there, but to have it bluntly spelled out like that is pretty damning.
Maybe these studies should be publicized a lot more. Nobody wants to be labeled a dunce, so it might cut down on racism, homophobia, and Tea Party Republicans all at once. 😉
(I have to point out that this refers only to today’s conservatives. Conservatism was a respectable position twenty or thirty years ago, it has just been hijacked more recently by the anyone-different-must-be-destroyed crowd, and the politicians willing to pander to them.)