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The Strasbourg Visual Scale: A Novel Method to Assess Visual Hallucinations.

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  • 1University of Strasbourg, INSERM U1114, Strasbourg, France.

Frontiers in Psychiatry
|June 28, 2021
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Visual hallucinations are difficult to describe, especially in psychosis. The Strasbourg Visual Scale (SVS) is a new tool that helps patients reconstruct hallucinated images step-by-step, improving understanding of self-disorders.

Keywords:
hallucinationsimageryphenomenologypsychosisscaleverbal reportvisual perception

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Area of Science:

  • Neuroscience
  • Psychology
  • Psychiatry

Background:

  • Self-perception relies on sensory input, differentiating self from the environment.
  • Visual hallucinations may stem from impaired self-world distinction.
  • Understanding hallucination mechanisms is crucial for studying self-disorders.

Purpose of the Study:

  • To develop a novel method for assessing subjective visual hallucinations.
  • To overcome challenges in verbalizing hallucinatory experiences.
  • To explore the relationship between hallucinations and disorders of the self.

Main Methods:

  • Development of the Strasbourg Visual Scale (SVS), a computerized tool.
  • SVS reconstructs hallucinated images by participant choices on visual properties.
  • Utilizes a step-by-step image-building process, akin to facial composite tools.

Main Results:

  • The SVS enables participants to communicate internal visual experiences.
  • The scale aids in progressively building an image resembling the hallucination.
  • Provides a method to complement existing scales for hallucination assessment.

Conclusions:

  • The SVS offers a novel approach to studying visual hallucinations.
  • This tool can enhance the understanding of subjective experiences in psychosis.
  • Facilitates research into the complex relationship between hallucinations and self-disorders.