Jonah Lehrer, who bangs out one of the better blogs about neuroscience, writes today about how evidence against a core belief can, in partisans, reinforce that corps belief, like when conservatives are given data showing that supply tax cuts really don't boost government coffers, or when liberals tend to discount data showing the success of welfare reform.
Are liberals and conservatives equally prone to succomb to this cognitive distortion? Lehrer, a liberal says yes:
The researchers argue that conservatives are particularly vulnerable to this cognitive flaw, as their beliefs tend to be more rigid and immutable. But I'm not so sure. As a liberal partisan hack, I'm very aware of how my political biases distort my processing of information. I fixate on news that jives with my beliefs and tend to ignore those inconvenient facts that contradict my inner talking points. .
Richard Hofstader wrote before the age of Tversky and Kahneman, but his wonderful essay about the paranoid style in American politics anticipates this effect explicitly:
One of the impressive things about paranoid literature is the contrast between its fantasied conclusions and the almost touching concern with factuality it invariably shows. It produces heroic strivings for evidence to prove that the unbelievable is the only thing that can be believed. Of course, there are highbrow, lowbrow, and middlebrow paranoids, as there are likely to be in any political tendency. But respectable paranoid literature not only starts from certain moral commitments that can indeed be justified but also carefully and all but obsessively accumulates :evidence." The difference between this "evidence" and that commonly employed by others is that it seems less a means of entering into normal political controversy than a means of warding off the profane intrusion of the secular political world. The paranoid seems to have little expectation of actually convincing a hostile world, but he can accumulate evidence in order to protect his cherished convictions from it.

Is this a post about Josh Marshall and Andrew Sullivan?
Posted by Petey | September 16, 2008 3:55 PM