Depression has a consistent mark in the brain even when symptoms are absent
nature.com
nature.com
As someone who has had chronic severe depression throughout their entire adult life and who will never get over it, this tracks. I've always taken in more information than other people. And from what I've experienced other depressed people also take in more information than normal. I've always known that "understanding the weight of the world" so to say often makes people depressed, but I always thought that was a perspective and enlightenment issue rather than what seems to be a permanent physiological change.
If that gets replicated then it would be an amazing finding. Imagine if this leads to easier ways of early predictions that might lead to preventative interventions in the future. Also, so many people who never experienced depression seem to be unable to think of it in any other way than a Very Bad Mood, and think it can be fixed in a similar way. This would finally provide a physical thing to point to to convince them that no, it really is not the same thing and needs a different intervention.
Salience is crucial in semiotic understanding when designing for other humans that are unique and different to the designer.
The best are very thoughtful people.