Child psychologist Jean Piaget, in his Plays, Dreams, and Imitation in Childhood, related a personal story about the malleability of memory:
...one of my first memories would date, if it were true, from my second year. I can still see, most clearly, the following scene, in which I believed until I was about fifteen. I was sitting in my pram, which my nurse was pushing in the Champs Elysees, when a men tried to kidnap me. I was held in by the strap fastened around me while my nurse bravely tried to stand between me and the thief. She received various scratches, and I can still see vaguely those on her face. Then a crowd gathered, a policeman with a short cloak and a white baton came up, and the man took to his heels. I can still see the whole scene, and can even place it near the tube station. When I was about fifteen, my parents received a letter from my former nurse saying that she had been converted to the Salvation Army. She wanted to confess her past faults, and in particular to return the watch she had been given as a reward on occasion. She had made up the whole story, faking the scratches. I, therefore, must have heard, as a child, the account of this story, which my parents believed, and projected into the past in the form of a visual memory.A visual memory, indeed--many years later Piaget could picture in his mind not only the scratches on his nurse's face but also the nonexistent crowd, the policeman with his cloak and baton, and the thief taking "to his heels"!
Excerpted and adapted from: The Magic of the Mind