Over-claiming knowledge predicts anti-establishment voting -- ScienceDaily
Comparing the responses with voter behavior and political leanings, they found that for each measurement point of self-perceived knowledge, the anti-establishment vote becomes 1.62 times more likely. Yet, an increase in actual knowledge decreases the likelihood of the anti-establishment vote by 0.85 per measurement point.
"The study does not show that anti-establishment voters are somehow less intelligent, or less concerned with society," says van Prooijen. "Future research may reveal whether the discrepancy between self-perceived understanding and actual knowledge is due to being uninformed or due to being misinformed."