Dichoptic reduction of the direction illusion is not due to binocular rivalry

Simultaneous direction repulsion (the direction illusion) occurs in bidirectional motion displays, typically transparent motion random dot kinematograms. Several laboratories have reported a greatly reduced illusion with dichoptic presentation of the two coherently translating stimuli as compared to monocular or binocular presentation. Some researchers have argued that those results might be due to a confounding factor, namely binocular rivalry occurring between test and inducing stimuli in the dichoptic condition, and so have attributed decisive weight to the results reported by Kim and Wilson (1997, Vision Research, 37, 991-1005) who used centre-surround grating stimuli and found large monocular as well as large dichoptic effects. Here we use centre-surround dot stimuli - with which no binocular rivalry occurs - to confirm a strong monocular contribution to the direction illusion. In addition, we fail to find evidence of a direction illusion with centre-surround grating stimuli, even when seeking to replicate the methods of Kim and Wilson (1997). In light of other evidence that a global motion-sensitive mechanism can determine the magnitude of the direction illusion, we propose that simultaneous direction repulsion can result from activity at multiple stages of the motion processing hierarchy.

[1]  R. Over,et al.  Lack of directional specificity in tilt aftereffect induced with moving contours , 1972 .

[2]  Ning Qian,et al.  Motion rivalry impairs motion repulsion , 2001, Vision Research.

[3]  Nicholas J. Wade,et al.  The influence of colour and contour rivalry on the magnitude of the tilt illusion , 1980, Vision Research.

[4]  R. Blake,et al.  Direction repulsion in motion transparency , 1996, Visual Neuroscience.

[5]  William Curran,et al.  Direction Repulsion Goes Global , 2003, Current Biology.

[6]  Alexander Grunewald,et al.  Motion repulsion is monocular , 2004, Vision Research.

[7]  H. Wilson,et al.  Motion Integration over Space: Interaction of the Center and Surround Motion* * This research was first reported at the Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1994 and 1995. , 1997, Vision Research.

[8]  Anthony J. Movshon,et al.  Visual Response Properties of Striate Cortical Neurons Projecting to Area MT in Macaque Monkeys , 1996, The Journal of Neuroscience.

[9]  P. Wenderoth,et al.  Orientation Illusions Induced by Briefly Flashed Plaids , 1989, Perception.

[10]  R. Sekuler,et al.  Adaptation alters perceived direction of motion , 1976, Vision Research.

[11]  Eero P. Simoncelli,et al.  Local velocity representation: evidence from motion adaptation , 1998, Vision Research.

[12]  Rainer Goebel,et al.  Activity patterns in human motion sensitive areas depend on the interpretation of global motion , 2001, NeuroImage.

[13]  P Wenderoth,et al.  Possible Neural Substrates for Orientation Analysis and Perception , 1987, Perception.

[14]  Stefan Treue,et al.  Reference Repulsion When Judging the Direction of Visual Motion , 1998, Perception.

[15]  P. Walker.  Orientation-Selective Inhibition and Binocular Rivalry , 1978, Perception.

[16]  H. J. Rauder.  Reference repulision when judging the direction of visual motion , 1998 .

[17]  William Curran,et al.  The direction aftereffect is driven by adaptation of local motion detectors , 2006, Vision Research.

[18]  Colin W.G. Clifford,et al.  Inter-ocular transfer of the tilt illusion shows that monocular orientation mechanisms are colour selective , 2005, Vision Research.

[19]  Peter Wenderoth,et al.  The different mechanisms of the motion direction illusion and aftereffect , 2007, Vision Research.

[20]  V. Virsu,et al.  Central inhibitory interactions in human vision , 1975, Experimental Brain Research.

[21]  R Blake,et al.  Interocular transfer of visual aftereffects. , 1981, Journal of experimental psychology. Human perception and performance.

[22]  Randolph Blake,et al.  On utrocular discrimination , 1979 .

[23]  C. Clifford.  Perceptual adaptation: motion parallels orientation , 2002, Trends in Cognitive Sciences.

[24]  R Näsänen,et al.  Cortical magnification and peripheral vision. , 1987, Journal of the Optical Society of America. A, Optics and image science.

[25]  What is the Reference in Reference Repulsion? , 2008, Perception.

[26]  David J. Heeger,et al.  Pattern-motion responses in human visual cortex , 2002, Nature Neuroscience.

[27]  R. Sekuler,et al.  Mutual repulsion between moving visual targets. , 1979, Science.

[28]  C. Benton,et al.  New binary direction aftereffect does not add up. , 2006, Journal of vision.

[29]  Catherine Z. Elgin,et al.  With reference to reference , 1983 .

[30]  Andrew T. Smith,et al.  Visual detection of motion , 1994 .

[31]  William Curran,et al.  The hierarchy of directional interactions in visual motion processing , 2008, Proceedings of the Royal Society B: Biological Sciences.

[32]  Robert Patterson,et al.  Direction-selective adaptation and simultaneous contrast induced by stereoscopic (cyclopean) motion , 1996, Vision Research.

[33]  William Curran,et al.  Speed tuning of direction repulsion describes an inverted U-function , 2003, Vision Research.

[34]  C W Clifford,et al.  Hierarchy of spatial interactions in the processing of contrast-defined contours. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[35]  B Moulden,et al.  A Simultaneous Shift in Apparent Direction: Further Evidence for a “Distribution-Shift” Model of Direction Coding , 1980, The Quarterly journal of experimental psychology.

[36]  S. Dakin,et al.  The role of relative motion computation in ‘direction repulsion’ , 2000, Vision Research.