"An aversion to uncertainty only exacerbates how similarly two conservative brains or two liberal brains respond when consuming political content," says Oriel FeldmanHall.

An aversion to uncertainty is often associated with black-and-white political views, according to a new study.

Since the 1950s, political scientists have theorized that political polarization—increased numbers of “political partisans” who view the world with an ideological bias—is associated with an inability to tolerate uncertainty and a need to hold predictable beliefs about the world.

But little is known about the biological mechanisms through which such biased perceptions arise.

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