word or phase for a belief or idea that is adopted or more firmly held based on hearing it repeatedly, as in an idea that is at first rejected and later adopted because the number of times the idea is presented.
The illusory truth effect is the idea that if you repeat something often enough, people will slowly start to believe it’s true. But a new study has revealed that the illusory truth effect is much stronger than we imagined. Because it turns out that even if a person has prior knowledge disproving a lie they’re being told, they’ll still believe the lie if it’s repeated enough.
Journal of Experimental Psychology: http://www.sciencedirect.com/science/article/pii/S0022537177800121