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Hallucinations in the general population.

Louise C Johns1

  • 1Section of Neuroimaging, PO 67, Department of Psychological Medicine, Institute of Psychiatry, De Crespigny Park, London SE5 8AF, United Kindgom. l.johns@iop.kcl.ac.uk

Current Psychiatry Reports
|June 7, 2005
PubMed
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Hallucinations are not always a sign of illness, as many "normal" individuals experience them. These experiences may share underlying causes with clinical psychosis, with beliefs and mood influencing patient status.

Area of Science:

  • Psychology
  • Psychiatry
  • Neuroscience

Background:

  • Hallucinations are experienced across various organic and psychiatric conditions.
  • However, hallucinations are not exclusive to illness and can occur in non-clinical populations.

Purpose of the Study:

  • To explore the continuum between normal and psychotic hallucinations.
  • To investigate shared etiologic influences in hallucinatory experiences.
  • To identify predictors of clinical patient status.

Main Methods:

  • Review of evidence on the continuum of hallucinations.
  • Analysis of shared sociodemographic and neurocognitive factors.
  • Examination of beliefs, mood, and control as predictors.

Related Experiment Videos

Main Results:

  • Psychotic hallucinations exist on a continuum with normal experiences.
  • A significant portion of the population experiences hallucinations without meeting clinical criteria.
  • Shared etiologic factors, including risk factors and neurocognitive mechanisms, influence both clinical and non-clinical hallucinations.

Conclusions:

  • Hallucinations represent a spectrum of experience, not solely indicative of pathology.
  • Understanding shared underlying mechanisms is crucial for both clinical and non-clinical populations.
  • Beliefs about hallucinations, negative mood, and perceived control are key differentiators for clinical status.