Schizophrenia and Related Disorders

Schizophrenia and related psychotic disorders – brief psychotic disorder, delusional disorder, schizoaffective disorder, schizophreniform disorder, and schizotypal personality disorder – are characterised by psychotic symptoms, and often by negative symptoms and cognitive dysfunction.

  • Psychotic symptoms include:
    • Delusions;
    • Hallucinations;
    • Disorganised thinking and speech; and
    • Bizarre and inappropriate motor behaviour (including catatonia).
  • Negative symptoms:
    • These are a decrease in or lack of normal emotions and behaviours.
    • For example, individuals may lack motivation and their face may not express emotions.
  • Cognitive dysfunction:
    • This refers to problems with thinking (cognition), such as being able to focus one’s attention, remember things, have self-control, and think flexibly.

Diagnosis and treatment of schizophrenia and related psychotic disorders are based on symptoms and the course of the specific illness.

Types of Schizophrenia and Related Disorders