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Criterion A

• Two or more characteristic symptoms are present for a significant part of 1 month, or less if successfully treated.
• At least one symptom is delusions, hallucinations, or disorganized speech.
• The characteristic symptoms are delusions, hallucinations, disorganized speech, grossly disorganized or catatonic behavior, and negative symptoms such as diminished emotional expression or avolition.

Criterion B

• For a significant portion of the time since onset, level of functioning in work, interpersonal relations, or self-care is markedly below the prior level.

Criterion C

• Continuous signs of disturbance persist for at least 6 months.

Criterion D

• Schizoaffective disorder and mood disorders with psychotic features have been ruled out appropriately.

Criterion E

• The disturbance is not attributable to a substance or another medical condition.

Criterion F

• Functioning in work, interpersonal relations, or self-care is markedly below prior level.
• If there is a history of autism spectrum disorder or communication disorder of childhood onset, prominent delusions or hallucinations must also be present for at least 1 month.

Related Guides

• Schizophrenia Symptoms and Signs
• Schizophrenia Scales and Assessment Tools
• Schizophrenia Treatments and Medications
• When to Seek Professional Help for Schizophrenia