[wu-ikkyu]

>some psychiatric conditions have lab tests of the same sort available.

Which ones?

"psychiatric diagnosis still relies exclusively on fallible subjective judgments rather than objective biological tests" -Allen Frances

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

[dragonwriter]

Schizophrenia had one on the market briefly, and there is one for bipolar disorder that is (or was, as of last year) in clinical trials.

See, e.g., http://www.thedailybeast.com/can-a-blood-test-diagnose-menta...

[wu-ikkyu]

Do you have a source for these claims? Because the DSM-5 says otherwise

>Diagnosis is based on observed behavior, the person's reported experiences, and reports of others familiar with the person...As of 2013 there is no objective test. [5]

https://en.m.wikipedia.org/wiki/Schizophrenia

Edit: the source you edited in simply states the corollary to what I've been saying all along: that scientists are still searching for a biological test for mental illness but as yet still do not have one