scholarly journals Perception of binocular 3-D motion: visual direction is more important than binocular disparity

2010 ◽  
Vol 3 (9) ◽  
pp. 95-95 ◽  
Author(s):  
J. M Harris ◽  
P. J Dean
Keyword(s):  
Binocular Disparity ◽  
Visual Direction

Binocular Displacement of Unpaired Region

Perception ◽  
1994 ◽  
Vol 23 (9) ◽  
pp. 1025-1036 ◽  
Author(s):  
Hiroshige Takeichi ◽  
Hitoshi Nakazawa
Keyword(s):  
Poggendorff Illusion ◽  
Previous Experiment ◽  
Binocular Disparity ◽  
Lateral Displacement ◽  
Spatial Layout ◽  
Visual Direction ◽  
Depth Discontinuity ◽  
Paired Stimuli ◽  
Poggendorff Figure ◽  
Unpaired Region

Binocular displacement of binocularly unpaired parts of the stimulus was examined by means of the Poggendorff figure. The Poggendorff figure can be used to investigate displacement since lateral displacement of the transversal may cause bias in judgments of its collinearity. In experiment 1, the transversal had a disparity, and thus binocularly unpaired parts, relative to the rectangle. The magnitude of the Poggendorff illusion should not have changed by addition of binocular disparity if displacement occurred. There was no or slight change when the transversal was seen behind the rectangle, but there was significant decrease when the transversal was seen in front of the rectangle, suggesting absence of displacement in this case. There were two possible explanations. One was that displacement depended on the positional relation between the unpaired stimuli and the binocularly presented rectangle, ie the occlusion constraint, which the case with the transversal in front did not satisfy. The alternative was that the decrease was due to the perceived front depth of the transversal, and not related to binocular displacement at all. In order to discriminate between these two possibilities, the transversal was reduced to only the unpaired parts, resulting in dichoptic stimulation in experiment 2. In this stimulus, the positional relation between the unpaired and the paired stimuli was the same as in the previous experiment, yet no front depth could be perceived. The results showed similar asymmetry as in experiment 1. Thus we conclude that binocular displacement depends on the positional relation between the unpaired and the paired stimuli, regardless of their perceived depth. This may imply that binocular displacement is not symmetric about the sign of disparity, hence that it is not just averaging but is a reconstruction of the spatial layout of objects in the outside world to keep the visual direction of the unsuppressed unpaired region veridical by using explicit cues to depth discontinuity.

scholarly journals Sleep does not aid the generalisation of binocular disparity‐based learning to the other visual hemifield

2021 ◽  
Author(s):  
Jens G. Klinzing ◽  
Hendrikje Nienborg ◽  
Karsten Rauss
Keyword(s):  
Binocular Disparity ◽  
The Other ◽  
Visual Hemifield

scholarly journals The Direction of Walking—but Not Throwing or Kicking—Is Adapted by Optic Flow

2010 ◽  
Vol 21 (7) ◽  
pp. 1006-1013 ◽  
Author(s):  
Hugo Bruggeman ◽  
William H. Warren
Keyword(s):  
Optic Flow ◽  
Perception And Action ◽  
Functional Mapping ◽  
Visual Direction ◽  
Head Orientation ◽  
Functional Level ◽  
Coordinate Frames ◽  
Negative Aftereffect

Optic flow is known to adapt the direction of walking, but the locus of adaptation remains unknown. The effect could be due to realignment of anatomical eye, head, trunk, and leg coordinate frames or to recalibration of a functional mapping from the visual direction of the target to the direction of locomotion. We tested whether adaptation of walking to a target, with optic flow displaced by 10°, transfers to facing, throwing, and kicking a ball to the target. A negative aftereffect for initial walking direction failed to transfer to head orientation or throwing or kicking direction. Thus, participants effectively threw or kicked the ball to the target, and then walked in another direction to retrieve it. These findings are consistent with recalibration of a task-specific visuo-locomotor mapping, revealing a functional level of organization in perception and action.

The Perception of a Depth Interval with Binocular Disparity Cues

1960 ◽  
Vol 50 (2) ◽  
pp. 257-269 ◽  
Author(s):  
Walter C. Gogel
Keyword(s):  
Binocular Disparity ◽  
Depth Interval

scholarly journals The cyclopean eye is relevant for predicting visual direction

2005 ◽  
Vol 45 (18) ◽  
pp. 2339-2345 ◽  
Author(s):  
Mykola Khokhotva ◽  
Hiroshi Ono ◽  
Alistair P. Mapp
Keyword(s):  
Visual Direction

Binocular Disparity in Aspherical Mirrors

1998 ◽  
Author(s):  
Stephen M. O'Day
Keyword(s):  
Binocular Disparity ◽  
Aspherical Mirrors

The early attentional pancake: Lack of selection in depth for rapid exogenous cueing

2021 ◽  
Author(s):  
Ryan Edward O'Donnell ◽  
Kyrie Murawski ◽  
Ella Herrmann ◽  
Jesse Wisch ◽  
Garrett D. Sullivan ◽  
...  
Keyword(s):  
Reaction Time ◽  
Binocular Disparity ◽  
Dimensional Space ◽  
Exogenous Attention ◽  
3 Dimensional ◽  
Exogenous Cueing ◽  
Different Depths ◽  
Depth Cueing ◽  
The Difference ◽  
Attentional Selectivity

There have been conflicting findings on the degree to which exogenous/reflexive visual attention is selective for depth, and this issue has important implications for attention models. Previous findings have attempted to find depth-based cueing effects on such attention using reaction time measures for stimuli presented in stereo goggles with a display screen. Results stemming from such approaches have been mixed, depending on whether target/distractor discrimination was required. To help clarify the existence of such depth effects, we have developed a paradigm that measures accuracy rather than reaction time in an immersive virtual-reality environment, providing a more appropriate context of depth. Four modified Posner Cueing paradigms were run to test for depth-specific attentional selectivity. Participants fixated a cross while attempting to identify a rapidly masked letter that was preceded by a cue that could be valid in depth and side, depth only, or side only. In Experiment 1, a potent cueing effect was found for side validity and a weak effect was found for depth. Experiment 2 controlled for differences in cue and target sizes when presented at different depths, which caused the depth validity effect to disappear entirely even though participants were explicitly asked to report depth and the difference in virtual depth was extreme (20 vs 300 meters). Experiments 3a and 3b brought the front depth plane even closer (1 m) to maximize effects of binocular disparity, but no reliable depth cueing validity was observed. Thus, it seems that rapid/exogenous attention pancakes 3-dimensional space into a 2-dimensional reference frame.

The Role of Binocular Disparity Vergence Eye Movements in Disambiguating Superimposed Retinal Images

1991 ◽  
pp. 217-221 ◽  
Author(s):  
Kenneth J. Ciuffreda ◽  
Mark Rosenfield ◽  
Lawrence Stark
Keyword(s):  
Eye Movements ◽  
Binocular Disparity ◽  
Retinal Images

Stereopsis in the Presence of Binocular Disparity

2017 ◽  
pp. 35-72
Author(s):  
Paul Linton
Keyword(s):  
Binocular Disparity
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