ArticleNeuropsychologia2014
Multiple forms of contour grouping deficits in schizophrenia: what is the role of spatial frequency?
Article in Neuropsychologia, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.
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Who cites it
21 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Atypical Use of Visuospatial Context in Psychotic Psychopathology: A Meta-analysis.Schizophrenia bulletin · 2025Pooled it
- Relationship Between Visual Integration, Social Cognition, and Symptoms in Schizophrenia: An Eye-Tracking Study.Turk psikiyatri dergisi = Turkish journal of psychiatry · 2026Article
- Contrast sensitivity and subjective visual disturbances across the psychosis continuum.Cognitive neuropsychiatry · 2026Article
- Systematic review and meta-analysis of early visual processing, social cognition, and functional outcomes in schizophrenia spectrum disorders.Schizophrenia research. Cognition · 2025Review
- Visual integration deficits associated with psychosis are independent of diagnosis.Schizophrenia (Heidelberg, Germany) · 2025Article
- Working memory and sensory memory in subclinical high schizotypy: An avenue for understanding schizophrenia?The European journal of neuroscience · 2023Review
- Cognitive and perceptual impairments in schizophrenia extend to other psychotic disorders but not schizotypy.Schizophrenia research. Cognition · 2022Article
- Cognitive function mediates the relationship between visual contrast sensitivity and functional outcome in schizophrenia.Journal of psychiatric research · 2021Article
- Smaller visual arrays are harder to integrate in schizophrenia: Evidence for impaired lateral connections in early vision.Psychiatry research · 2019Article
- A review of visual aftereffects in schizophrenia.Neuroscience and biobehavioral reviews · 2019Review
- Intact illusory contour formation but equivalently impaired visual shape completion in first- and later-episode schizophrenia.Journal of abnormal psychology · 2019Article
- Intact perception of coherent motion, dynamic rigid form, and biological motion in chronic schizophrenia.Psychiatry research · 2018Article
- Contour interpolation: A case study in Modularity of Mind.Cognition · 2018Article
- Colour discrimination thresholds in type 1 Bipolar Disorder: a pilot study.Scientific reports · 2017Article
- Visual perceptual remediation for individuals with schizophrenia: Rationale, method, and three case studies.Psychiatric rehabilitation journal · 2017Article
- Visual integration dysfunction in schizophrenia arises by the first psychotic episode and worsens with illness duration.Journal of abnormal psychology · 2016Article
- Comparison of visual perceptual organization in schizophrenia and body dysmorphic disorder.Psychiatry research · 2015Article
- Cortical contributions to impaired contour integration in schizophrenia.Neuropsychologia · 2015Article
- Schizophrenia and the eye.Schizophrenia research. Cognition · 2015Article
- EEG findings of reduced neural synchronization during visual integration in schizophrenia.PloS one · 2015Article
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5 authors.
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Abstract
Schizophrenia patients poorly perceive Kanizsa figures and integrate co-aligned contour elements (Gabors). They also poorly process low spatial frequencies (SFs), which presumably reflects dysfunction along the dorsal pathway. Can contour grouping deficits be explained in terms of the spatial frequency content of the display elements? To address the question, we tested patients and matched controls on three contour grouping paradigms in which the SF composition was modulated. In the Kanizsa task, subjects discriminated quartets of sectored circles ("pac-men") that either formed or did not form Kanizsa shapes (illusory and fragmented conditions, respectively). In contour integration, subjects identified the screen quadrant thought to contain a closed chain of co-circular Gabors. In collinear facilitation, subjects attempted to detect a central low-contrast element flanked by collinear or orthogonal high-contrast elements, and facilitation corresponded to the amount by which collinear flankers reduced contrast thresholds. We varied SF by modifying the element features in the Kanizsa task and by scaling the entire stimulus display in the remaining tasks (SFs ranging from 4 to 12 cycles/deg). Irrespective of SF, patients were worse at discriminating illusory, but not fragmented shapes. Contrary to our hypothesis, collinear facilitation and contour integration were abnormal in the clinical group only for the higher SF (>=10 c/deg). Grouping performance correlated with clinical variables, such as conceptual disorganization, general symptoms, and levels of functioning. In schizophrenia, three forms of contour grouping impairments prominently arise and cannot be attributed to poor low SF processing. Neurobiological and clinical implications are discussed.
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