Stereospatial masking and aftereffect with normal and transformed random-dot patterns

Long, Nigel; Over, Ray

doi:10.3758/bf03213940

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…Nonetheless, the patterns of interference that have been observed are compatible with the notion that the visual system processes stereo-defined depth effectively as a third spatial dimension (e.g. Butler & Westheimer, 1978; Long & Over, 1974; Tyler & Kontsevich, 2005). We thus decided to use masks overlapping with the targets also in depth, i.e.…”

Section: Experiments 1: Natural Scenessupporting

confidence: 77%

The Role of Binocular Disparity in Rapid Scene and Pattern Recognition

et al. 2013

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We investigated the contribution of binocular disparity to the rapid recognition of scenes and simpler spatial patterns using a paradigm combining backward masked stimulus presentation and short-term match-to-sample recognition. First, we showed that binocular disparity did not contribute significantly to the recognition of briefly presented natural and artificial scenes, even when the availability of monocular cues was reduced. Subsequently, using dense random dot stereograms as stimuli, we showed that observers were in principle able to extract spatial patterns defined only by disparity under brief, masked presentations. Comparing our results with the predictions from a cue-summation model, we showed that combining disparity with luminance did not per se disrupt the processing of disparity. Our results suggest that the rapid recognition of scenes is mediated mostly by a monocular comparison of the images, although we can rely on stereo in fast pattern recognition.

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Section: Experiments 1: Natural Scenessupporting

confidence: 77%

The Role of Binocular Disparity in Rapid Scene and Pattern Recognition

et al. 2013

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Transfer of Learning in Transformed Random-Dot Stereostimuli

Long

1982

Perception

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The transfer of learning between normal and monocularly-transformed small-disparity, random-dot stereostimuli has been examined under extended viewing conditions. When the disparity value was constant, transfer of learning between normal and monocularly-transformed stereostimuli was disrupted by both low-frequency and high-frequency transformations. These results suggest that stereolearning is restricted to disparity units that are selective to the same spatial-frequency characteristics.

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A Proximity-Contingent Stereoscopic Depth Aftereffect: Evidence for Adaptation to Disparity Gradients

Ryan

Gillam

1993

Perception

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Prolonged inspection of a surface slanted in the third dimension of visual space typically results in a negative aftereffect such that, after adaptation, a surface in the fronto-parallel plane will appear slanted in the opposite direction. Binocular disparity is not necessary to generate such effects, since they can be obtained monocularly, presumably via adaptation to texture gradient. Six experiments demonstrated durable stereoscopic depth aftereffects in the absence of a texture gradient--by using discrete disparate objects rather than slanted surfaces--and demonstrated that adaptation was to the interobject disparity gradient rather than to the relative disparity of the objects per se. The disparity required to null the obtained aftereffects was inversely proportional to the horizontal separation of elements, for a constant disparity, and directly proportional to the separation of subsequently presented probes. When elements differed in depth (disparity), but were not laterally separated, nulling disparity was significant but invariant with changes in the horizontal separation of probe elements. In that case, adaptation was (i) either to the disparity gradient generated by the vertical separation of probe elements (of which the relative disparity component was tapped); or (ii) to relative disparity per se.

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Stereospatial masking and aftereffect with normal and transformed random-dot patterns

Cited by 3 publications

References 20 publications

The Role of Binocular Disparity in Rapid Scene and Pattern Recognition

The Role of Binocular Disparity in Rapid Scene and Pattern Recognition

Transfer of Learning in Transformed Random-Dot Stereostimuli

A Proximity-Contingent Stereoscopic Depth Aftereffect: Evidence for Adaptation to Disparity Gradients

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