Evidence map›Paper›PMID 26315020›Full record

ArticlePsychological medicine2015

Reduced contextual effects on visual contrast perception in schizophrenia and bipolar affective disorder.

M-P Schallmo, S R Sponheim, C A Olman

Abstract read
In one paragraph

Article in Psychological medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Trial
  4. Review
  5. Article
  6. Impaired Contour Object Perception in Psychosis.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2026
    Article
  7. Article
  8. Journal of neurophysiology · 2025
    Article
  9. Article
  10. Article
  11. Impaired contour object perception in psychosis.medRxiv : the preprint server for health sciences · 2024
    Article
  12. Faster bi-stable visual switching in psychosis.Translational psychiatry · 2024
    Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Perceptual Center-Surround Contrast Suppression in Adolescence.Investigative ophthalmology & visual science · 2023
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

M-P SchallmoGraduate Program in Neuroscience,University of Minnesota,Minneapolis, MN,USA.
S R SponheimVeterans Affairs Medical Center,Minneapolis, MN,USA.
C A OlmanDepartment of Psychology,University of Minnesota,Minneapolis, MN,USA.

Funding

PREDOCTORAL TRAINING OF NEUROSCIENTISTST32GM008471 · NIGMS · UNIVERSITY OF MINNESOTA TWIN CITIES · PI EBNER, TIMOTHY J · 1993 to 2017
$4.9M
Localized fMRI of heterogeneous neural responsesR21NS075525 · NINDS · UNIVERSITY OF MINNESOTA · PI OLMAN, CHERYL A. · 2012 to 2013
$394k
Quantitative Modeling of Visual Perception Endophenotypes in SchizophreniaI01CX000227 · VA · MINNEAPOLIS VA MEDICAL CENTER · PI SPONHEIM, SCOTT R · 2011 to 2018
–
CSRD VA I01 CX000227NIGMS NIH HHS T32 GM008471NIGMS NIH HHS T32 GM0847NINDS NIH HHS R21 NS075525
6 · The paper itself

Abstract

backgroundThe salience of a visual stimulus is often reduced by nearby stimuli, an effect known as surround suppression of perceived contrast, which may help in locating the borders of an object. Weaker surround suppression has been observed in schizophrenia but it is unclear whether this abnormality is present in other mental disorders with similar symptomatology, or is evident in people with genetic liability for schizophrenia.

methodBy examining surround suppression among subjects with schizophrenia or bipolar affective disorder, their unaffected biological relatives and healthy controls we sought to determine whether diminished surround suppression was specific to schizophrenia, and if subjects with a genetic risk for either disorder would show similar deficits. Measuring perceived contrast in different surround conditions also allowed us to investigate how this suppression depends on the similarity of target and surrounding stimuli.

resultsSurround suppression was weaker among schizophrenia patients regardless of surround configuration. Subjects with bipolar affective disorder showed an intermediate deficit, with stronger suppression than in schizophrenia but weaker than control subjects. Surround suppression was normal in relatives of both patient groups. Findings support a deficit in broadly tuned (rather than sharply orientation- or direction-selective) suppression mechanisms.

conclusionsWeak broadly tuned suppression during visual perception is evident in schizophrenia and bipolar affective disorder, consistent with impaired gain control related to the clinical expression of these conditions.

Indexed as

AdultBipolar DisorderCase-Control StudiesContrast SensitivityFemaleHumansMaleMiddle AgedOrientationPhotic StimulationSchizophreniaVisual CortexContextual modulationgain controlgenetic liabilitysurround suppressionunaffected relatives

Identifiers

PMID26315020
PMCPMC4624017

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.