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Cited by 47Visual perception and processing mechanismsSchizophrenia research and treatmentHallucinations in medical conditions

The effect of peripheral visual motion on focal contrast sensitivity in positive- and negative-symptom schizophrenia

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Slaghuis, Walter L, Thompson, Alanda K·2003·Neuropsychologia
DOI 10.1016/s0028-3932(02)00321-4
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Abstract

The aim of the present research was to investigate the effect of peripheral (ambient) stimulation on focal visual processing using the far-out jerk effect in normal observers and subgroups with positive- and negative-symptoms in schizophrenia. The far-out jerk effect refers to a reduction in sensitivity of a briefly presented stimulus in central vision in the presence of a sudden movement or oscillation of a stimulus in peripheral vision. In order to measure the far-out jerk effect the focal contrast sensitivity of 5.0Hz modulated sinusoidal target gratings (0.5, 1.0, 2.0, 4.0, and 8.0 number of cycles per degree (c/degrees )) was measured in the presence of three kinds of peripheral surround: a blank field, a stationary 0.75 c/degrees grating, and a 5.0Hz drifting 0.75 c/degrees grating (far-out jerk effect). The findings showed that there were no significant differences in focal contrast sensitivity between the control and positive-symptom group with a blank field and stationary grating surround. However, a 5.0Hz drifting grating surround resulted in a significant reduction in contrast sensitivity at 0.5, 1.0 and 2.0 c/degrees in the positive-symptom group. In comparison with the control group the negative-symptom group showed a generalised reduction in focal contrast sensitivity, a significantly smaller far-out jerk effect, and a significant reduction in contrast sensitivity at 0.5 c/degrees with a stationary grating surround. The finding that both stationary and moving peripheral surrounds have an inhibitory effect on focal contrast sensitivity suggests that there is a dispersion in the visual demarcation between stationary and temporal events in the perception of visual motion in the negative-symptom group.

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  • Patients with schizophrenia show preferential M-pathway dysfunction, although deficits have also been observed in parvocellular processing.

    “Patients with schizophrenia show preferential M-pathway dysfunction (21,22,28,35–38), although deficits have also been observed in parvocellular processing (19,20).”

    From Visual perception and its impairment in schizophrenia (2008) · cites this paper as [37]

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Authors
Slaghuis, W. L., & Thompson, A. K.
Affiliations
University of Tasmania (AU)
Corresponding author
Slaghuis, Walter L
Venue
Neuropsychologia
Publisher
Elsevier BV
Published
2003-01
Volume
41
Issue
8
Pages
968-980
ISSN
0028-3932 (ISSN-L)
DOI
10.1016/s0028-3932(02)00321-4
OpenAlex
W2031923713
Cited by
47
References
92
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 2 · 2017: 2 · 2015: 3 · 2014: 1 · 2013: 4 · 2012: 1
FWCI
1.14
Type
journal article
Language
en
Open access
Licence
Locations
  • Neuropsychologia (publishedVersion)
  • PubMed (publishedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • University of Tasmania
  • Australian Research Council
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
Keywords
schizophrenia, positive symptoms, negative symptoms, visual attention, visual processing, sinusoidal gratings, visual motion perception
MeSH terms
Adult, Female, Flicker Fusion, Humans, Male, Motion Perception, Pattern Recognition, Visual, Perceptual Masking, Photic Stimulation, Psychiatric Status Rating Scales, Psychophysics, Schizophrenia, Schizophrenic Psychology, Space Perception, Vision Tests, Visual Fields, Contrast Sensitivity

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