The Economist -
13 Mar 2014 18:00

AS JOHN IOANNIDIS prepares to launch an institute intended, among other things, to combat small, statistically underpowered scientific studies (see article), just such a study has hit the headlines. The media reaction to it neatly illustrates what Dr Ioannidis is talking about, for the impression given by those headlines is that researchers have found a way to predict Alzheimer's disease. At the moment, that cannot be done reliably, though a brain scan or a spinal tap can confirm suspicions. And...
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