[gyulai]

I wonder how robust those findings actually are, especially for high-functioning persons in the ADHD spectrum where the symptoms are not clinically debilitating.

I'm thinking now of how f-MRI is notoriously difficult to get right in methodological terms [1] while at the same time providing an all-to-convenient path for psychologists wanting to add credibility to their claims by tying them into physiological manifestation. I know next to nothing about the field though, so who knows. ...just expressing baseline scepticism I guess.

[1] https://www.discovermagazine.com/mind/fmri-gets-slap-in-the-...

[pseudalopex]

The problem with FMRI is fishing for correlations in an ocean of variables without adjusting the calculations. Structural MRI finding physical differences where older evidence predicted is very different.

Organisms are analog. Why would you expect marginally symptomatic brains to be clearly distinct?