zlacker

That's not exactly strong evidence that "quality of professional diagnosis is poor" though... it's just evidence that quality was poor in cases you're aware of. It's also not evidence at all that being tracked by facebook would have come up with better results sooner.

>>diggin+(OP)
Back when the problem was too much psychiatric care instead of not enough there was this famous experiment

https://en.wikipedia.org/wiki/Rosenhan_experiment

This one is more positive but is checking that different diagnosticians get the same answer

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5980511/

and if that was applied to the "Thud" experiment you'd have poor diagnosis with a very high kappa (interrater agreement)