Marc S. Tibber
Visual surround suppression in schizophrenia
Tibber, Marc S.; Anderson, Elaine J.; Bobin, Tracy; Antonova, Elena; Seabright, Alice; Wright, Bernice; Carlin, Patricia; Shergill, Sukhwinder S.; Dakin, Steven C.
Elaine J. Anderson
Dr Bernice Wright Bernice.Wright@hull.ac.uk
Sukhwinder S. Shergill
Steven C. Dakin
Compared to unaffected observers patients with schizophrenia (SZ) show characteristic differences in visual perception, including a reduced susceptibility to the influence of context on judgments of contrast – a manifestation of weaker surround suppression (SS). To examine the generality of this phenomenon we measured the ability of 24 individuals with SZ to judge the luminance, contrast, orientation, and size of targets embedded in contextual surrounds that would typically influence the target’s appearance. Individuals with SZ demonstrated weaker SS compared to matched controls for stimuli defined by contrast or size, but not for those defined by luminance or orientation. As perceived luminance is thought to be regulated at the earliest stages of visual processing our findings are consistent with a suppression deficit that is predominantly cortical in origin. In addition, we propose that preserved orientation SS in SZ may reflect the sparing of broadly tuned mechanisms of suppression. We attempt to reconcile these data with findings from previous studies.
Tibber, M. S., Anderson, E. J., Bobin, T., Antonova, E., Seabright, A., Wright, B., …Dakin, S. C. (2013). Visual surround suppression in schizophrenia. Frontiers in Psychology, 4(FEB), Article 88. https://doi.org/10.3389/fpsyg.2013.00088
|Journal Article Type||Article|
|Acceptance Date||Jan 23, 2013|
|Publication Date||Feb 28, 2013|
|Deposit Date||Jul 5, 2018|
|Publicly Available Date||Oct 27, 2022|
|Journal||Frontiers in Psychology|
|Peer Reviewed||Peer Reviewed|
|Keywords||Schizophrenia; Surround suppression; Cortex; Contrast; Luminance; Size; Orientation; Perception|
Publisher Licence URL
© 2013 Tibber, Anderson, Bobin, Antonova, Seabright, Wright, Carlin, Shergill and Dakin. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
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