In 1978, a famous psychologist named Elizabeth Loftus conducted “The Misinformation Effect”, a study which found one’s recollection of memories can be distorted by subsequent information.
Loftus said: “The misinformation effect refers to the impairment in memory for the past that arises after exposure to misleading information.”
In other words, if someone says or implies that something looks a certain way, there’s a natural tendency to believe them if you’ve never paid close attention to it.
In some cases, the misleading information can actually overwrite one’s original memory, if it’s presented in a way that makes it seem more plausible...
http://www.news.com.au/lifestyle/real-life/wtf/the-mandela-effect
