Much research efforts have been invested in finding the biological substrate of the DSM diagnostic categories, e.g. schizophrenia, anxiety disorders, mood disorders. Scientists meet at conferences like the International Congress of Schizophrenia Research or the International Anxiety Disorders Symposium. Often anxiety disorder researchers are not acquainted with schizophrenia researchers. In the field of anxiety disorders, schizophrenia and depression, etcetera researchers have come to the same conclusion independently, for example that the patients suffer from a deficit in executive functioning or selective attention. It is not surprising that no specific biological substrates have been found to aid the diagnostic process like a test for tuberculosis. Many biological abnormalities have been reported in psychiatric disorders, e.g. in the field of neuroimaging, cognition and neurophysiology but these deficits are not specific to the DSM categories. In an excellent review article of Millan et al. (2012), cognitive deficits were summarized across psychiatric disorders, showing the large overlap.