During severe episodes of mania or depression people with bipolar disorder may have psychotic symptoms, such as hallucinations or delusions.[3] When experiencing hallucinations or delusions, people with schizophrenia often seem to "lose touch" with reality.[2] "Voices" are the most common type of hallucination in schizophrenia.[4] In bipolar disorder, the psychotic symptoms tend to reflect the person's extreme depressed or elated mood (mood congruence).[3] People with either disorder may have delusions of grandeur in which they believe they are a famous person or historical figure.[3][4] When psychotic symptoms are present, bipolar disorder is sometimes misdiagnosed as schizophrenia.[3]