The Mach-Dvorak Phenomenon and Binocular Fusion of Moving Stimuli

Depth judgments of the Mach-Dvorak phenomenon induced by cyclic, intermittent stimulation were used to assess eye coordination in binocular vision. The response to the experimental manipulations of the simultaneous and alternate neutral points, the points of zero and maximum disparity, was suggestive of the function of multiple neural processes. The data were strongly supportive of an interaction between direction of stimulus motion and interocular sequencing. Reduced illumination of one eye affected the time of occurrence of the simultaneous and alternate neutral points oppositely, dependent upon exposure conditions. The data for equal duration exposure condition were suggestive of the known nasal-temporal conductive latency difference.