The characteristic symptoms of schizophreniform disorder are identical to those of schizophrenia (Criterion A) [ Two (or more) of the following, each present for a significant amount of time during a 1-month period (or less if successfully treated). At least one of these must be (1), (2), or (3): 1. Delusions. 2. Hallucinations. 3. Disorganized speech (e.g., frequent derailment or incoherence). 4. Grossly disorganized or catatonic behavior. 5. Negative symptoms (i.e., diminished emotional expression or avolition). ] Schizophreniform disorder is distinguished by its difference in duration: the total duration of the illness including prodromal, active, and residual phases, is at least 1 month but not less than 6 months (Criterion B). [...] In addition to the five symptom domain areas identified in the diagnostic criteria, the assessment of cognition, depression, and mania symptom domains is vital for making critically important distinctions between the various schizophrenia spectrum and other psychotic disorders.*

 

*Diagnostic and Statistical Manual of Mental Disorders: DSM-5. 5th ed. Washington, D.C.: American Psychiatric Association, 2013. 97-98. Print