Schizoaffective disorder (abbreviated as SAD) is a mental disorder characterized by disordered thought process (called psychosis) and abnormal emotions (called mood disorder). Common symptoms of psychosis include auditory hallucinations, paranoid delusions, and disorganized speech and thinking. Schizoaffective disorder is divided into two mood disorder types: bipolar or depressive. The bipolar type is distinguished by symptoms of mania, hypomania, or mixed episodes; the depressive type by symptoms of depression exclusively. Symptoms of schizoaffective disorder usually begin in young adulthood.