Maybe I read the original research article incorrectly, or maybe this BBC piece is discussing something additional, but my impression after reading about it more closely was that this test is actually discriminating Alzheimer's from other forms of dementia, not Alzheimer's vs no dementia.
I haven't thought this through yet but it seems interesting and important but also not quite how it's being portrayed in the media, and not quite as significant in some ways.
I haven't thought this through yet but it seems interesting and important but also not quite how it's being portrayed in the media, and not quite as significant in some ways.