The inability of human adults to retrieve genuine memories for events that occurred before about three years of age. Also called childhood amnesia. Faced with overwhelming evidence for this phenomenon, even the Austrian neurologist Sigmund Freud (1856–1939) was forced to accept it in his book Three Essays on the Theory of Sexuality (1905) (Standard Edition, VI, pp. 130–243, at pp. 174–6). See also false memory, false memory syndrome, paramnesia (1), Piaget kidnapping memory, screen memory.