Lab Tests for Psychiatric Disorders: Few Clinicians Are Aware of Them: The Lack of Laboratory Tests to Validate the Clinical Diagnosis of Schizophrenia Is Widely Accepted and Lamented by Psychiatric Practitioners. in a Recent Survey I Conducted on CurrentPsychiatry.com, Most Respondents Guessed There Are 3 Known Biomarkers for Schizophrenia and 4 for Major Depression