Earlier quoted context omitted.
> I think my parents were just baffled, thought I was moody/cynical. > There needs to be a blood test, or something like it, rather than having to rely on baffled parents, or patients who might not even realize certain symptoms are even worth bringing up at all. And that's relying on the parents to even be looking for issues in their offspring. If they're narcissistic, the child could go undiagnosed.
You can't blame parents for their child's depression. You can't expect even the most seasoned psychiatric worker to be able to diagnose depression from sight. Currently self-reporting is the only way to diagnose. Observation simply doesn't work. There was a great doco on the BBC ( http://www.bbc.co.uk/programmes/b00fm5ql ) where they had a house full of people with various different mental illnesses, and trained psyc…
Oftentimes, but definitely not always, it's surprising to me how easy it is to detect cases of childhood abuse, autism, bipolar disorder, and narcissistic personality disorder, based on very limited interaction.
Obviously one is never sure, but very often the symptoms are 'textbook' enough that at the very least an informed guess can be made.
I'm willing to say I'm entirely wrong about this though. It's just been my experience so far.