In the litterature on depression scales, these are often validated by comparing their convergent validity with the diagnoses given by psychiatrists. This of course implicitly assumes that the psychiatrists' diagnosis is more accurate than any existing scale.
So what evidence or discussions are you aware of regarding the validity of the depression diagnosis as administered by a psychiatrist (or psychologist)?
Great question! About which "depression" are you exactly talking about?
I don't think there are studies that answer your question specificaly, but there are some that are comparing psychiatric diagnostics versus scales results.
This may answer some questions.
https://www.omicsonline.org/open-access/limitations-of-clinical-psychiatric-diagnostic-measurements-2329-6895.1000122.php?aid=15238
Article The Reliability of Psychiatric Diagnosis Revisited: The Clin...
We compared the historical diagnosis "melancholia" with the modern "severe depression" according to ICD-10 in our first study "Mental illness in Sweden (1896-1905) reflected through case records from a local general hospital". None received the modern diagnoses "mild or moderate depression". The old case records describe depressed patients in a similar way as we do today. Just a historical perspective ;-).
The cause of depression is organic disturbances due to disturbances in the course of certain reflexes. The diagnosis on the psychiatric diagnosis scale is unreliable and inaccurate. It is necessary to diagnose the cause of depression, which is the manifestation of nervous disorders. Depression due to the primary cause is not a psychiatric illness but organic, the cause of which is a disturbance in the course of certain reflexes.
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