[HTML][HTML] Reduced crowding and poor contour detection in schizophrenia are consistent with weak surround inhibition
V Robol, MS Tibber, EJ Anderson, T Bobin, P Carlin… - PloS one, 2013 - journals.plos.org
Background Detection of visual contours (strings of small oriented elements) is markedly
poor in schizophrenia. This has previously been attributed to an inability to group local …
poor in schizophrenia. This has previously been attributed to an inability to group local …
[HTML][HTML] Abnormal contextual modulation of visual contour detection in patients with schizophrenia
Schizophrenia patients demonstrate perceptual deficits consistent with broad dysfunction in
visual context processing. These include poor integration of segments forming visual …
visual context processing. These include poor integration of segments forming visual …
Reduced top-down influences in contour detection in schizophrenia
S Silverstein, M Hatashita-Wong… - Cognitive …, 2006 - Taylor & Francis
Introduction. Chronic schizophrenia patients have previously demonstrated performance
deficits in contour integration tasks. The purpose of this study was to investigate whether …
deficits in contour integration tasks. The purpose of this study was to investigate whether …
Reduced influence of perceptual context in schizophrenia: behavioral and neurophysiological evidence
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 …
objects in the environment. Both the ability to detect visual contours and the influence of …
The spatial range of contour integration deficits in schizophrenia
Contour integration (CI) refers to the process that represents spatially separated elements as
a unified edge or closed shape. Schizophrenia is a psychiatric disorder characterized by …
a unified edge or closed shape. Schizophrenia is a psychiatric disorder characterized by …
[HTML][HTML] Visual surround suppression in schizophrenia
MS Tibber, EJ Anderson, T Bobin, E Antonova… - Frontiers in …, 2013 - frontiersin.org
Compared to unaffected observers patients with schizophrenia (SZ) show characteristic
differences in visual perception, including a reduced susceptibility to the influence of context …
differences in visual perception, including a reduced susceptibility to the influence of context …
Cortical contributions to impaired contour integration in schizophrenia
Objectives Visual perceptual organization impairments in schizophrenia (SCZ) are well
established, but their neurobiological bases are not. The current study used the previously …
established, but their neurobiological bases are not. The current study used the previously …
Multiple forms of contour grouping deficits in schizophrenia: what is the role of spatial frequency?
Schizophrenia patients poorly perceive Kanizsa figures and integrate co-aligned contour
elements (Gabors). They also poorly process low spatial frequencies (SFs), which …
elements (Gabors). They also poorly process low spatial frequencies (SFs), which …
Smaller visual arrays are harder to integrate in schizophrenia: Evidence for impaired lateral connections in early vision
Long-range horizontal connections in early vision undergird a well-studied “collinear
facilitation” effect, wherein a central low-contrast target becomes more detectable when …
facilitation” effect, wherein a central low-contrast target becomes more detectable when …
Intact illusory contour formation but equivalently impaired visual shape completion in first-and later-episode schizophrenia.
Visual shape completion is a fundamental process that constructs contours and shapes on
the basis of the geometric relations between spatially separated edge elements. People with …
the basis of the geometric relations between spatially separated edge elements. People with …