Whether or not the diagnosis system actually assesses what it claims to be assessing. I.e that those diagnosed with schizophrenia actually have schizophrenia
Different countries may use different classification systems, meaning the standard for what's considered schizophrenic will vary between countries and psychiatrists
Many of the symptoms that are used as criteria to diagnose schizophrenics are also found in other mental disorders such as depression and bipolar disorder
Clinicians in the U.S equated mentally healthy adult behaviour to mentally healthy men, and consequently this meant women were more likely to be perceived as less mentally healthy
The main issue with the diagnosis of schizophrenia is that the classification of the disorder is difficult to determine as symptoms aren't specific to just one illness, and so different psychiatrists use different means to diagnose individuals
The diagnoses and classification of schizophrenia are variable based on the judgement of psychiatrists, hence it is less accurate compared to other mental disorders