Schizophrenia typically occurs between the ages of 16 and 30. It is considered a severe mental disorder that affects an individual’s relationship with reality. Symptoms of psychotic behavior are categorized as positive (such as hallucinations), negative (such as a flat affect), and cognitive (such as limited executive functioning). The final category of symptoms is cognitive (ability to process information). Bipolar disorder signs and symptoms during a manic episode include a fast speech pattern and the feeling of being energized.