Those interested in the reliability of eye witness accounts (something which comes up frequently here: "but we have witnesses! are you calling them liars?") might be interested in this BBC radio program: Elizabeth Loftus and Eye Witness Testimony.
She has done a lot of experimental work on how well people recall events, and how easy it is to create false memories (the "meeting Bugs Bunny at Disneyland" example is particularly compelling).Elizabeth Loftus is the highest-ranking female in the list of top 100 psychologists. She's gained world-wide renown for her experiments showing that memory, far from being an accurate record, is influenced by subsequent exposure to information and events and is re-constituted according to the biases these create.
The program mentions the fact that after a large quake in California (maybe Loma Prieta, I can't remember now) as people told and retold stories of what happened to them they gradually added extra information including things that couldn't have happened to them, but that they had heard from others.
This is similar to the story of The Long Walk; it seems that several different people tell the same, or similar, stories of their escape from the gulags and trek to India. It is not clear that any of them are lying or making the story up. They all seem to believe it happened to them, and maybe bits of it did. But they all include some common details that can't have happened to all of them. So they seem have created memories based on their own experience and stories they heard from others.