1.

For 1 month, individual displays two or more of the following symptoms much of the time:

(a) Delusions

(b) Hallucinations

(c) Disorganized speech

(d) Very abnormal motor activity, including catatonia

(e) Negative symptoms

2.

At least one of the individual’s symptoms must be delusions, hallucinations, or disorganized speech.

3.

Individual functions much more poorly in various life spheres than was the case prior to the symptoms.

4.

Beyond this 1 month of intense symptomology, individual continues to display some degree of impaired functioning for at least 5 additional months.

(Information from: APA, 2013.)