or occupational functioning).
C. Continuous signs of the disturbance persist for at least 6 months. This 6-month period
must include at least 1 month of symptoms (or less if successfully treated) that meet Cri-
terion A (i.e., active-phase symptoms) and may include periods of prodromal or residual
symptoms. During these prodromal or residual periods, the signs of the disturbance may
be manifested by only negative symptoms or by two or more symptoms listed in Criterion
A present in an attenuated form (e.g., odd beliefs, unusual perceptual experiences).
D. Schizoaffective disorder and depressive or bipolar disorder with psychotic features
have been ruled out because either 1) no major depressive or manic episodes have
occurred concurrently with the active-phas e symptoms, or 2) if mood episodes have
occurred during active-phase symptoms, they  have been present for a minority of the
total duration of the active and residual periods of the illness.
E. The disturbance is not attributable to the physiological effects of a substance (e.g., a
drug of abuse, a medication) or another medical condition.
F. If there is a history of autism spectrum disorder or a communication disorder of child-
hood onset, the additional diagnosis of schizophrenia is made only if prominent delu-
sions or hallucinations, in addition to the other required symptoms of schizophrenia,
are also present for at least 1 month (or less if successfully treated).
Specify if:
The following course specifiers are only to be used after a 1-year duration of the disorder
and if they are not in contradiction to the diagnostic course criteria.
First episode, currentl y in acute episode:  First manifestation of the disorder meet-
ing the defining diagnostic symptom and time criteria. An acute episode is a time pe-
riod in which the symptom criteria are fulfilled.