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Oral history and geriatric mental health: distortions of testimony produced by psychopathology.

When oral historians choose to study an event or era that is a quarter or half century past, the witnesses that must be interviewed are likely to be quite old. Although most oral historians usually succeed in choosing informants who are lucid, alert, and otherwise quite capable of giving valuable testimony, there is always the risk that a witness will be suffering from some sort of mental disorder which will overly determine the veracity or tone of that testimony. The purpose of this piece is to describe the major mental disorders of later life and discuss the ways in which they might distort an oral history.