"Vocabulary Changes... as an Indication of Dementia"

Retrospective diagnostic strategy employing linguistic analysis of works by the champion of murder-mysteries, from the Times:

"Did Agatha Christie, who wrote several dozen mystery novels during her 53-year career, suffer from Alzheimer's-related dementia? Though some of her biographers have suspected as much, actual evidence was advanced in March by a research team led by Ian Lancashire and Graeme Hirst, professors at the University of Toronto, in a paper called 'Vocabulary Changes in Agatha Christie's Mysteries as an Indication of Dementia.'"

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