We like to think that education changes people for the better, helping them critically analyze information and providing a certain immunity from disinformation. But if that were really true, then you wouldn't have low vaccination rates clustering in areas where parents are, on average, highly educated.

Vaccination isn't generally a political issue. (Or, it is, but it's rejected both by people who don't trust pharmaceutical companies and by those who don't trust government mandates; these tend to cluster on opposite ends of the political spectrum.) But some researchers decided to look at a number of issues that have become politicized, such as the Iraq War, evolution, and climate change. They find that, for these issues, education actually makes it harder for people to accept reality, an effect they ascribe to the fact that "highly educated partisans would be better equipped to challenge information inconsistent with predispositions."

The researchers looked at two sets of questions about the Iraq War. The first involved the justifications for the war (weapons of mass destruction and links to Al Qaeda), as well as the perception of the war outside the US. The second focused on the role of the troop surge in reducing violence within Iraq. At the time the polls were taken, there was a clear reality: no evidence of an active weapons program or links to Al Qaeda; the war was frowned upon overseas; and the surge had successfully reduced violence in the country.

On the three issues that were most embarrassing to the Bush administration, Democrats were more likely to get things right, and their accuracy increased as their level of education rose. In contrast, the most and least educated Republicans were equally likely to have things wrong. When it came to the surge, the converse was true. Education increased the chances that Republicans would recognize reality, while the Democratic acceptance of the facts stayed flat even as education levels rose. In fact, among Democrats, the base level of recognition that the surge was a success was so low that it's not even clear it would have been possible to detect a downward trend.

When it came to evolution, the poll question didn't even ask whether people accepted the reality of evolution. Instead, it asked “Is there general agreement among scientists that humans have evolved over time, or not?” (This phrasing generally makes it easier for people to accept the reality of evolution, since it's not asking about their personal beliefs.) Again, education increased the acceptance of this reality among both Democrats and Republicans, but the magnitude of the effect was much smaller among Republicans. In fact, the impact of ideology was stronger than education itself: "The effect of Republican identification on the likelihood of believing that there is a scientific consensus is roughly three times that of the effect of education."

For climate change, the participants were asked “Do you believe that the earth is getting warmer because of human activity or natural patterns?” Overall, about the beliefs of 70 percent of those polled lined up with scientific conclusions on the matter. And, among the least educated, party affiliation made very little difference in terms of getting this right. But, as education rose, Democrats were more likely to get this right, while Republicans saw their accuracy drop. At the highest levels of education, Democrats got it right 90 percent of the time, while Republicans less than half.

The results are in keeping with a number of other studies that have been published of late, which also show that partisan divides over things that could be considered factual sometimes increase with education. Typically, these issues are widely perceived as political. (With some exceptions; GMOs, for example.) In this case, the authors suspect that education simply allows people to deploy more sophisticated cognitive filters that end up rejecting information that could otherwise compel them to change their perceptions.

The authors conclude that's somewhat mixed news for democracy itself. Education is intended to improve people's ability to assimilate information upon which to base their political judgements. And, to a large extent, it does: people, on average, got 70 percent of the questions right, and there was only a single case where education made matters worse.

Unfortunately, that issue was climate change, which may be one of the most critical global issues facing voters. It's not clear why this issue is so exceptional in terms of how strongly education enhances the rejection of the scientific community's conclusions. While it has become highly politicized, it's unlikely to have reached the divisiveness of the Iraq war.

Politics & Policy, 2014. DOI: 10.1111/polp.12098 (About DOIs).

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