The PMHNP is called to collaborate with a colleague about a challenging diagnosis. Which of the following statements correctly describes the way in which schizoaffective disorder may be differentiated from bipolar disorder?

In bipolar disorder, psychotic symptoms do not last longer than 1 month

In bipolar disorder, psychotic symptoms always co-occur with mood symptoms

Schizoaffective disorder involves only depressive episodes, never manic or hypomanic episodes

Schizoaffective disorder never includes full-blown episodes of major depression