DISQUS

More like "not necessarily." Sounds to me like the researcher wanted to say whatever causes the difference is unknown, which isn't surprising, because that wasn't what was being studied. You wouldn't know that from the LA times article, but you wouldn't know it from this article either. The thing that one should be able to take away from this study is that there is a relationship between at least one specific behavioral characteristic and political affiliation. Whether or not these findings will be replicated remains to be discovered. The cause of this behavioral characteristic would have to be discovered through an entirely different experiment. What doesn't remain to be discovered though, is your opinion regarding the role genes play on behavior.