While their brain activity differed, the two groups' behaviors were identical, the study found.
Schreiber and his colleagues can't say whether the functional brain differences nudge people toward a particular ideology or not. The brain changes based on how it is used, so it is possible that acting in a partisan way prompts the differences.
The functional differences did mesh well with political beliefs, however. The researchers were able to predict a person's political party by looking at their brain function 82.9 percent of the time. In comparison, knowing the structure of these regions predicts party correctly 71 percent of the time, and knowing someone's parents' political affiliation can tell you theirs 69.5 percent of the time, the researchers wrote.
This article originally appeared on LiveScience.com.
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