Cited by 27Schizophrenia research and treatmentVisual perception and processing mechanismsHallucinations in medical conditions

The Miiller-Lyer Illusion as a Tool for Schizophrenia Screening

Pessoa, V.F., Monge-Fuentes, V., Simon, C.Y., Suganuma, E., Tavares, M.C.H.·2008·Reviews in the Neurosciences

Abstract

The perceptual deficit hypothesis for schizophrenia is based on more general models of normal human visual perception, which have traditionally postulated that objects must compete for attention and processing space in the visual system. Recent evidence suggests that susceptibility of schizophrenics to the Müller-Lyer (ML) illusion may be a marker of vulnerability, detectable in prodromic patients, but disappearing with the progression of the illness. This illusion consists of overestimating the length of a straight line with converging arrowheads at the ends, while underestimating those with diverging arrowheads. Although the ML illusion has been shown to occur in touch as well as vision, it is not known whether abnormal contextual suppression extends to other sensory modalities in schizophrenics. Another challenge consists in verifying whether different visual parameters of the illusion which favor the magnocellular and parvocellular systems would have diverse ML illusion effects in schizophrenia. In this review we present data showing the degree of illusion in capuchin monkeys (Cebus spp.), a possible animal model for schizophrenia. To this end, a computer program was developed to conduct experiments in humans and non-human primates, allowing the display of illusory figures, manipulation of the stimuli's exposure time, interval between stimuli and number of trials. In the non-primate experiments, the visual illusion test based on achromatic ML illusion figures indicated the presence of the ML illusory effect in 10 capuchin monkeys. These results suggest that Cebus might be a good model for the experimental study of schizophrenia.

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Crossref · 10.1515/revneuro.2008.19.2-3.91

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  • Paradigms that test an illusory effect via visuomotor performances are thought to engage complex cross-modal coordination and are of particular interest in schizophrenia.

    “In this regard, paradigms that test an illusory effect via visuomotor performances are thought to engage a complex cross-modal coordination and, thus, are of particular interest in schizophrenia (Pessoa et al., 2008; Chen et al., 2011).”

    From What visual illusions teach us about schizophrenia (2014) · cites this paper as Pessoa et al., 2008

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Authors
Pessoa, V. F., Monge-Fuentes, V., Simon, C. Y., Suganuma, E., & Tavares, M. C. H.
Affiliations
Universidade de Brasília (BR)
Venue
Reviews in the Neurosciences
Published
2008-01
Volume
19
Issue
2-3
Pages
91-100
ISSN
  • 0334-1763 (ISSN-L)
  • 2191-0200
OpenAlex
W2030583602
Cited by
27
References
82
Citations by year
2025: 2 · 2023: 3 · 2022: 1 · 2021: 3 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 2
FWCI
0.26
Type
journal article
Language
en
Open access
closed
Locations
  • Reviews in the Neurosciences (publishedVersion)
  • PubMed (publishedVersion)
Funders
Fundação de Empreendimentos Científicos e Tecnológicos
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
Keywords
Müller-Lyer illusion, prodromal schizophrenia, capuchin monkeys, animal models of schizophrenia, visual perception, multisensory illusions
MeSH terms
Animals, Humans, Optical Illusions, Pattern Recognition, Visual, Schizophrenia

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