Americans, despite having access to the same publicly available information, nevertheless inhabit disparate perceptual worlds.
People assume that their view is the majority view, even given evidence to the contrary, contributing to the false consensus effect. If one’s views change, others’ views are assumed to have changed also.
Shaw, Kate. Never mind the polls—we’re convinced our candidate is going to win. Ars Technica 2/23/2012.<http://arstechnica.com/science/news/2012/02/in-politics-were-convinced-that-our-candidate-is-a-shoo-in.ars>.