Bear in mind that the labels "liberal" and "conservative" are not timeless or neutral. There is no reason to expect that there would be equal proportions of "conservatives" and "liberals" in any given intellectual movement, phyg, profession, or other group, without first asking what those labels are used to mean, and whether those meanings are in accord with, or opposed to, that group's goals or interests. It is not reasonable to proclaim that unequal representation of political labels in a group is indicative of bias on the part of that group's members — at least not without considering and rejecting other hypotheses for that inequality.
The specific views associated with these labels in the mainstream have shifted and changed around over time. In the U.S. today, the term "conservatism" is heavily associated with (among other things) opposition to secularism, science, and sexual equality. If you call yourself a "conservative", people may expect that you support creationism, school prayer, and the persecution of gays — just for instance. Thus, one would expect that fewer biologists, atheists, or gay people would call themselves "conservative" than in the general population — not because biologists, atheists, and gays are biased against conservatism, but because the word "conservative" means, in part, opposition to biology, atheism, and gays.
This is not because of something inherent about "conservatism" (which is, after all, a label and has nothing inherent about it at all). It has to do with the specific movements which have claimed that label. (Again, these labels shift — few would expect of a "progressive" today that they favored eugenics, despite that having been once a position labeled "progressive".) People may have good reasons to decline to associate themselves with a label, even if they may agree with some other views that have sometimes been labeled "conservative" in the past — and this is not bias, at least, not in the sense that we generally use that term here.
I find it interesting that this is never pointed out when occasional casual speculation based on reasoning similar to my own (except without actual examples) that our large libertarian minority might be biasing us towards libertarian ideas?
Same goes for those talking about Feminist biases btw.
Summary: Current social psychology research is probably on average compromised by political bias leftward. Conservative researchers are likely discriminated against in at least this field. More importantly papers and research that does not fit a liberal perspective faces greater barriers and burdens.
An article in the online publication inside higher ed on a survey on anti-conservative bias among social psychologists.
The link above is worth following. The problems that arise remind me of the situation with academic and our own ethics in light of this paper.
I can't help but think that self-assessments are probably too generous. For predictive power of how an individual behaves when the behaviour in question is undesirable, I'm more likely to take their estimate of how "colleagues" behave than their estimate of how they personally do.
This shouldn't be surprising to hear since to quote CharlieSheen: "we even have LW posters who have in academia personally experienced discrimination and harassment because of their right wing politics."
While I can see Lammers' point that this as disturbing from a fairness perspective to people grinding their way through academia and should serve as warning for right wing LessWrong readers working through the system, I find the issue of how this our heavy reliance on academia for our map of reality might lead to us inheriting such distortions of the map of reality much more concerning. Overall in light of this if a widely accepted conclusion from social psychology favours a "right wing" perspective it is more likely to be correct than if no such biases against such perspectives existed. Conclusions that favour "left wing" perspective are also somewhat less likely to be true than if no such biases existed. We should update accordingly.
I also think there are reasons to think we may have similar problems on this site.