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Abnormal global processing along the dorsal visual pathway in autism: a possible mechanism for weak visuospatial coherence?
- E. Pellicano, L. Gibson, M. Maybery, K. Durkin, D. Badcock
- Medicine, Psychology
- 31 December 2005
Frith and Happe (Frith, U., & Happe, F. (1994). Autism: Beyond theory of mind. Cognition, 50, 115-132) argue that individuals with autism exhibit 'weak central coherence': an inability to integrate… Expand
Global motion perception: No interaction between the first- and second-order motion pathways
The experiments reported here address the issue of whether the pathways which extract motion from first-order and second-order spatial patterns remain separate or whether they combine at some higher… Expand
Specific reading disability: differences in contrast sensitivity as a function of spatial frequency.
Contrast thresholds for sine-wave gratings of spatial frequencies of 2, 4, 12, and 16 cycles per degree were determined for normal and disabled readers at a range of stimulus durations. Normal… Expand
Depth-increment detection function for individual spatial channels.
We have used stimuli with difference-of-Gaussian (DOG) luminance profiles to measure depth-increment thresholds within postulated spatial channels as functions of depth from the fixation plane.… Expand
Global motion perception: Interaction of the ON and OFF pathways
A number of experiments were conducted to investigate the interaction of the ON and OFF pathways in the processing of global-motion signals. The stimulus employed was a variant of that used by… Expand
Adaptive pooling of visual motion signals by the human visual system revealed with a novel multi-element stimulus.
The two-dimensional (2D) trajectory of visual motion is usually not directly available to the visual system. Local one-dimensional (1D) sensors initiate processing but can only restrict the solution… Expand
Spatial location and hyperacuity: The centre/surround localization contribution function has two substrates
Vernier acuity and jump detection were investigated using a perturbation technique, in which a flanking line is placed to one side of the target line. The size and direction of vernier displacement,… Expand
Coherent global motion in the absence of coherent velocity signals
It is widely believed that form and motion are analysed separately in mammalian visual systems. Form is confined within a stream that projects ventrally from V1 to the inferotemporal cortex, and… Expand
Spatial location and hyperacuity: flank position within the centre and surround zones.
Sensitivity to a horizontal displacement of a vertical line was measured in order to ascertain the influence of the location of parallel flanking lines on the apparent position of features in visual… Expand
A Simple Hebbian/Anti-Hebbian Network Learns the Sparse, Independent Components of Natural Images
Slightly modified versions of an early Hebbian/anti-Hebbian neural network are shown to be capable of extracting the sparse, independent linear components of a prefiltered natural image set. An… Expand