Is segmentation of two motion-defined surfaces aided by differences in the spatial characteristics of the pattern elements?
” Perception 28 ECVP Abstract Supplement Is segmentation of two motion-defined surfaces aided by differences in the spatial characteristics of the pattern elements? I Steffens, A Smith Two sets of moving dots were combined to produce two motion-defined surfaces that were either transparent or adjacent. To provide an objective test of ability to segregate the two surfaces, observers were required to segregate the surfaces and then compare the direction of motion of one of them with a reference direction. In the control condition, all dots had the same luminance and contrast. In a second condition, dots belonging to the two surfaces had different luminances so as to make them perceptually distinguishable. In a third condition, the two sets of dots were drawn separately, bandpass filtered with different pass bands and then added. In a final condition, the dots were replaced by line elements and different orientations were used for the two surfaces. The results showed that differences in v
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