Additional experiments, growing out of Asch’s basic method, find large conformity effects for judgments of many different kinds. Consider the following finding. People were asked, ‘Which one of the following do you feel is the most important problem facing our country today?’ Five alternatives were offered: economic recession, educational facilities, subversive activities, mental health, and crime and corruption. Asked privately, a mere 12 percent chose subversive activities. But when exposed to an apparent group consensus unanimously selecting that option, 48 percent of people made the same choice!
Excerpt from: Nudge: Improving Decisions About Health, Wealth and Happiness by Richard Thaler and Cass Sunstein