Political liberals falsely assume that other liberals don’t hold their views, according to a recent study published in Psychological Science:
Liberals showed what the researchers call “truly false uniqueness,” perceiving their beliefs as more divergent from the beliefs of other liberals than they actually were. Moderates and conservatives, on the other hand, showed evidence of “truly false consensus,” perceiving their beliefs to be more similar to those of other members of their political group than they actually were.
Data from a second study suggest that the relationship is driven by participants’ desire to feel unique: Liberals reported a stronger desire for uniqueness than did moderates or conservatives.
Surprisingly, these trends even emerged among nonpolitical judgments, such as preference for coffee: Liberals believed their preferences were more different from those of other liberals than they actually were, while conservatives believed their preferences were more similar to those of other conservatives than they actually were.