Pluralistic ignorance
Pluralistic ignorance can be contrasted with the false consensus effect. In pluralistic ignorance, people privately disdain but publicly support a norm (or a belief), while the false consensus effect causes people to wrongly assume that most people think like they do, while in reality most people do not think like they do (and express the disagreement openly). For instance, pluralistic ignorance may lead a student to drink alcohol excessively because she believes that everyone else does that, while in reality everyone else also wishes they could avoid binge drinking, but no one expresses that due to the fear of being ostracized. A false consensus for the same situation would mean that the student believes that most other people do not enjoy excessive drinking, while in fact most other people do enjoy that and openly express their opinion about it.
Elmer Eric Schattschneider
Along with the political scientist Theodore J. Lowi, Schattschneider offered perhaps "the most devastating" critique of the American political theory of pluralism: Rather than an essentially democratic system in which the many, competing interests of citizens are amply represented, if not advanced, by equally many competing interest groups, Schattschneider argued the pressure system is biased in favor of "the most educated and highest-income members of society", and showed that "the difference between those who participate in interest group activity and those who stand at the sidelines is much greater that between voters and nonvoters."