Results 21 to 30 of about 4,956,636 (266)
Cortical contributions to impaired contour integration in schizophrenia. [PDF]
Neuropsychologia, 2015 Objectives Visual perceptual organization impairments in schizophrenia (SCZ) are well established, but their neurobiological bases are not. The current study used the previously validated Jittered Orientation Visual Integration (JOVI) task, along with ...
Silverstein SM +7 more
europepmc +2 more sources
Responses in early visual areas to contour integration are context dependent. [PDF]
J Vis, 2016 It has been shown that early visual areas are involved in contour processing. However, it is not clear how local and global context interact to influence responses in those areas, nor has the interarea coordination that yields coherent structural ...
Qiu C, Burton PC, Kersten D, Olman CA.
europepmc +2 more sources
Context modulates the ERP signature of contour integration. [PDF]
PLoS ONE, 2011 We investigated how the electrophysiological signature of contour integration is changed by the context in which a contour is embedded. Specifically, we manipulated the orientations of Gabor elements surrounding an embedded shape outline.
Bart Machilsen +3 more
doaj +2 more sources
Dynamics of contour integration
Vision Research, 2001 To determine the dynamics of contour integration the temporal properties of the individual contour elements were varied as well as those of the contour they form. A temporal version of a contour integration paradigm (Field, D. J., Hayes, A., & Hess, R. F.
Kathy T Mullen +2 more
exaly +3 more sources
Do We Need Another Neural Correlate of Contour Integration? [PDF]
i-Perception, 2014 Gilad and colleagues use an elegant combination of voltage-sensitive dyes and high temporal and spatial resolution optical imaging to visualize a differential response to collinear contour elements in monkey V1.
Lee de-Wit, Dietrich Samuel Schwarzkopf
doaj +2 more sources
The effect of aging on contour integration
Vision Research, 2008 Perception of global patterns requires the integration of local orientation information across space. The present study examined whether this integration ability declines in older age. We measured contrast thresholds for discriminating the global orientation of a "C" shaped contour against a blank background in younger and older subjects.
Eugenie Roudaia +2 more
exaly +3 more sources
Contour integration in anisometropic amblyopia
Vision Research, 1998 Contour integration was measured in a group of anisometropic amblyopes to test the idea recently put forward that positional uncertainty sets a fundamental limit to contour integration in amblyopia. Anisometropic amblyopia, unlike strabismic amblyopia, has little or no positional uncertainty once the initial filtering loss has been taken into account ...
R F Hess
exaly +3 more sources
Contour integration in the peripheral field
Vision Research, 1999 Contour integration was measured in the normal peripheral field to determine if an explanation based solely on the known peripheral positional uncertainty was sufficient to explain performance. The task involved the detection of paths composed of micropatterns with correlated carrier orientations embedded in a field of similar micropatterns of random ...
Steven Dakin, R F Hess
exaly +3 more sources
Contour integration across depth
Vision Research, 1995 In order to investigate the extent of the local connections subserving contour integration across depth, we measured performance for detecting the continuity of a path of Gabor elements distributed in depth and embedded in a three-dimensional field of random background elements.
David J Field, R F Hess
exaly +3 more sources
Closure facilitates contour integration
Vision Research, 2007 Closed contours are often better perceived than those not fully enclosing an area, i.e., open contours. This facilitation of contour integration by closure, however, has been questioned arguing that in earlier studies closed contours were often "smoother" than open ones, because open contours usually had turning points.
Birgit Mathes
exaly +3 more sources