I concur that many of the diagnostics methods are small sample sized for psychological tests. However I believe we have a lot more neurological evidence for und

I concur that many of the diagnostics methods are small sample sized for psychological tests. However I believe we have a lot more neurological evidence for underlying conditions and mechanisms in some. Schizophrenia for example has clear neurological hypothesis relating to agency and we can clearly tell these patients in a standard MRI. The same cannot be said for ADHD or ASD