Politically extreme people, whether on the far right or far left, have surprisingly similar brain responses, according to a study conducted by a team led by Oriel FeldmanHall from Brown University in Rhode Island, United States.

The study, published in the journal Journal Of Personality And Social Psychology, involved 44 participants who were first surveyed about their political views and placed on a scale ranging from 0 (extremely liberal) to 100 (extremely conservative).