"Facts are stored first in the hippocampus, a structure deep in the brain ... Every time we recall it, our brain writes it down again, and during this re-storage, it is also reprocessed. In time, the fact is gradually transferred to the cerebral cortex and is separated from the context in which it was originally learned. ..."
"This phenomenon, known as source amnesia, can also lead people to forget whether a statement is true. Even when a lie is presented with a disclaimer, people often later remember it as true."
"With time, this misremembering gets worse. A false statement from a noncredible source that is at first not believed can gain credibility during the months it takes to reprocess memories from short-term hippocampal storage to longer-term cortical storage. As the source is forgotten, the message and its implications gain strength."
Audrey@homeschoolsource.co.uk: Could this phenomenon not be due to the reconstruction of information proposed by Bartlett and later by Elizabeth Loftus. We are always trying to match new information with information already stored in our memory. No matter how strange the new information is we will make it fit something already there; thereby leading to a distortion of this new learning.
Via Katherine Stevens