Schizophrenia and related disorders—brief psychotic disorder, delusional disorder, schizoaffective disorder, and schizophreniform disorder—are characterized by psychotic symptoms and often by negative symptoms and/or cognitive dysfunction. Psychotic symptoms include delusions, hallucinations, disorganized thinking and speech, and bizarre and inappropriate motor behavior (including catatonia). Negative symptoms refer to a decrease in or lack of normal emotions and behaviors, such as having a flattened affect and lack of motivation. Cognitive dysfunction involves mainly sustained attention and working memory.
Last full review/revision July 2013 by S. Charles Schulz
Content last modified August 2013