I've never been part of any study, but I'm defnitly part of the group that finds positive thinking detrimental.

I need to be able to purge the negativity, and that means embracing it to a certain extent...

I tried the positive thinking route and it felt inauthentic, and actually magnified the depression because in my mind, I was lying to myself and reminding myself of everyting that was wrong...

Just thought I'd share from this side of the coin