A new model that uses cognitive testing may help determine whether memory loss is benign or likely to progress to Alzheimer's disease in older adults, researchers from Johns Hopkins University suggest. Records of 528 people who underwent cognitive testing for dementia between 1996 and 2004 were compared with healthy controls, and findings showed that healthy adults' scores generated a "symmetrical, bell-shaped range" compared with those of people with dementia, whose distributions were asymmetrical. The study appears in the journal Neuropsychology.

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