Psychological DisordersSchizophreniaSchizophreniais one of several psychotic disorders described in the DSM. People with psychotic disorders lose contact with reality and often have delusions or hallucinations. People with schizophrenia have a wide range of symptoms, which can be classified into positive or negative symptoms.Positive SymptomsPositive symptomsinvolve the presence of altered behaviors. Examples of positive symptoms include delusions, hallucinations, disorganized speech, and disorganized behavior. Delusionsare false beliefs that are strongly held despite contradictory evidence. Hallucinationsare sensory or perceptual experiences that happen without any external stimulus. Hallucinations can occur in any sensory modality, but auditory hallucinations are most common in schizophrenia. Disorganized speech can also take many forms. For example, a person with schizophrenia may produce word salad, which consists of words and sentences strung together in an incoherent way.
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