a quick guide to media reports about brain studies

When someone in the media says:

Researchers at [fill-in-the-blank university/institution] have found that group X's brains are better at [fill-in-the-blank specific task] than group Y's.

This is what they really mean:

In the study, group X's results formed a bell curve. And group Y's results also formed a bell curve. And those bell curves largely overlapped - in other words, the groups were more similar than different. However, if you ignore those bell curves and simply look at the average result for each group, then those average numbers differ somewhat. And that is *so much* easier & more fascinating to report, so that is all we're going to tell you about the study!

That is pretty much everything you need to know about media and pop science reporting on brain studies...

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