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Cited by 67Schizophrenia research and treatmentVisual perception and processing mechanismsHallucinations in medical conditions

Reduced top-down influences in contour detection in schizophrenia

Silverstein, Steven, Hatashita-Wong, Michi, Schenkel, Lindsay, Wilkniss, Sandra, Kovács, Ilona, Fehér, Akos, Smith, Thomas, Goicochea, Claudia +3 more·2006·Cognitive Neuropsychiatry
DOI 10.1080/13546800444000209
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Abstract

INTRODUCTION: Chronic schizophrenia patients have previously demonstrated performance deficits in contour integration tasks. The purpose of this study was to investigate whether schizophrenia patients, spanning a range of illness severity, would demonstrate responsiveness to manipulations that recruit top-down processing strategies involving learning and sequencing effects in a contour integration task. METHODS: We administered a contour integration test over four consecutive days and in two different presentation conditions each day. In one condition, the stimuli were administered in order of increasing difficulty, and in the other they were presented in random order. The order in which these two conditions were presented was counterbalanced across days and participants. In addition, a nonschizophrenia psychotic disorders control group was included to determine if past findings of a contour integration deficit in schizophrenia could be replicated in the presence of a symptomatically similar control group. RESULTS: All groups demonstrated similar learning curves across the four days and generally similar overall levels of performance, with the exception of the group of the most chronic schizophrenia patients. In addition, the order in which the stimuli were presented to subjects affected their performance, with higher scores achieved for all groups in the condition where the stimuli were presented in increasing order of difficulty. Interaction effects revealed that the effects of order presentation were greater for nonpatient than for psychotic patients. CONCLUSIONS: These data are further evidence that perceptual organization impairments in schizophrenia are illness severity-related, and that schizophrenia patients as a whole are less sensitive to top-down manipulations in this type of task.

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  • Impairments in visual integration have been linked to illness severity and chronicity.

    “Impairments in visual integration have been linked to increases in disorganized symptoms (57,66,67), poorer premorbid social functioning (82), presence of childhood trauma in schizophrenia (83), and illness severity and chronicity (84).”

    From Visual perception and its impairment in schizophrenia (2008) · cites this paper as [84]

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Authors
Silverstein, S., Hatashita-Wong, M., Schenkel, L., Wilkniss, S., Kovács, I., Fehér, A., Smith, T., Goicochea, C., Uhlhaas, P., Carpiniello, K., & Savitz, A.
Affiliations
  • Cornell University (US)
  • Rutgers, The State University of New Jersey (US)
ORCID
Venue
Cognitive Neuropsychiatry
Publisher
Informa UK Limited
Published
2006-03
Volume
11
Issue
2
Pages
112-132
ISSN
  • 1354-6805 (ISSN-L)
  • 1464-0619
DOI
10.1080/13546800444000209
OpenAlex
W2053900431
Cited by
67
References
54
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 5 · 2016: 2 · 2015: 4 · 2014: 2 · 2013: 9 · 2012: 3
FWCI
3.18
Type
journal article
Language
en
Open access
closed
Locations
  • Cognitive Neuropsychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (R01MH066362)
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
schizophrenia, contour integration, top-down processing, perceptual organization, learning effects, stimulus presentation order, disease severity, perceptual deficits, psychosis
MeSH terms
Adult, Chronic Disease, Female, Form Perception, Humans, Male, Pattern Recognition, Visual, Perceptual Disorders, Schizophrenia, Severity of Illness Index, Antipsychotic Agents

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