Every time I read a part of the DSM-V, as a layman, I'm flabbergasted how vague and redundant and arbitrary symptoms and diagnostics are made (e.g. "if 6 out of 10 then..."). It just seems that on its face, while psychiatry has improved and began doing more good than harm since deinstitutionalization, it still lacks the rigor found in other applied scientific fields such as cardiology and oncology for example.

This study is a very good step in the right direction. The other direction is more quantitative methods such as measuring the brain waves response to a retinal laser flash to detect mental disorders (look it up, it's real)