Evidence map›Paper›PMID 31858929›Full record

ArticlePsychological medicine2021

Reduced influence of perceptual context in schizophrenia: behavioral and neurophysiological evidence.

Victor J Pokorny, Timothy J Lano, Michael-Paul Schallmo, Cheryl A Olman, Scott R Sponheim

Open access · greenAbstract readComparative Study
In one paragraph

Article in Psychological medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 11% of its field
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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.

  1. Pooled it
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  3. Review
  4. Impaired Contour Object Perception in Psychosis.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2026
    Article
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  6. Impaired contour object perception in psychosis.medRxiv : the preprint server for health sciences · 2024
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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

5 authors at 2 institutions in 1 country.

Victor J PokornyMinneapolis Veterans Affairs Health Care System, Minneapolis, MN55417, USA.ORCID 0000-0002-1003-0196
Timothy J LanoMinneapolis Veterans Affairs Health Care System, Minneapolis, MN55417, USA.
Michael-Paul SchallmoDepartment of Psychiatry and Behavioral Science, University of Minnesota, Minneapolis, MN, USA.ORCID 0000-0001-8252-8607
Cheryl A OlmanDepartment of Psychology, University of Minnesota, Minneapolis, MN, USA.ORCID 0000-0002-7324-6461
Scott R SponheimMinneapolis Veterans Affairs Health Care System, Minneapolis, MN55417, USA.
University of Minnesota · USMinneapolis VA Health Care System · US

Funding

TRD4 - Ultrahigh Field Engineering and SafetyP41EB027061 · NIBIB · UNIVERSITY OF MINNESOTA · PI Gregory John Metzger, KAMIL UGURBIL · 2019 to 2026
$11.7M
Visual TestingP30EY011374 · NEI · UNIVERSITY OF MINNESOTA TWIN CITIES · PI NEWMAN, ERIC A · 1996 to 2019
$8.8M
Perceptual Mechanisms of Visual Hallucinations and Illusions in PsychosisR01MH112583 · NIMH · UNIVERSITY OF MINNESOTA · PI SPONHEIM, SCOTT R · 2017 to 2021
$2.4M
Aberrant Cortical Dynamics in SchizophreniaR24MH069675 · NIMH · UNIVERSITY OF MINNESOTA TWIN CITIES · PI SPONHEIM, SCOTT R · 2004 to 2006
$893k
Quantitative Modeling of Visual Perception Endophenotypes in SchizophreniaI01CX000227 · VA · MINNEAPOLIS VA MEDICAL CENTER · PI SPONHEIM, SCOTT R · 2011 to 2018
–
CSRD VA I01 CX000227NEI NIH HHS P30 EY011374NIBIB NIH HHS P41 EB027061NIMH NIH HHS R01 MH112583NIMH NIH HHS R24 MH069675
6 · The paper itself

Abstract

backgroundAccurate perception of visual contours is essential for seeing and differentiating objects in the environment. Both the ability to detect visual contours and the influence of perceptual context created by surrounding stimuli are diminished in people with schizophrenia (SCZ). The central aim of the present study was to better understand the biological underpinnings of impaired contour integration and weakened effects of perceptual context. Additionally, we sought to determine whether visual perceptual abnormalities reflect genetic factors in SCZ and are present in other severe mental disorders.

methodsWe examined behavioral data and event-related potentials (ERPs) collected during the perception of simple linear contours embedded in similar background stimuli in 27 patients with SCZ, 23 patients with bipolar disorder (BP), 23 first-degree relatives of SCZ, and 37 controls.

resultsSCZ exhibited impaired visual contour detection while BP exhibited intermediate performance. The orientation of neighboring stimuli (i.e. flankers) relative to the contour modulated perception across all groups, but SCZ exhibited weakened suppression by the perceptual context created by flankers. Late visual (occipital P2) and cognitive (centroparietal P3) neural responses showed group differences and flanker orientation effects, unlike earlier ERPs (occipital P1 and N1). Moreover, behavioral effects of flanker context on contour perception were correlated with modulation in P2 & P3 amplitudes.

conclusionIn addition to replicating and extending findings of abnormal contour integration and visual context modulation in SCZ, we provide novel evidence that the abnormal use of perceptual context is associated with higher-order sensory and cognitive processes.

Indexed as

Evoked PotentialsSchizophrenic PsychologyAdultBehaviorFemaleHumansMaleMiddle AgedSchizophreniaVisual PerceptionContextcontourEEGperceptionpsychosisschizophrenia

Identifiers

PMID31858929
PMCPMC7444089
OpenAlexW2996299938

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.