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Visual persistence of figures defined by relative motion.

Measured visual persistence (VP) of figures that were solely defined by relative motion (motion-defined figures [MDFs] or motion figures) in 3 experiments with the author and 4 observers using random-dot kinematograms. MDFs persisted for about 130 msec after the dots stopped moving, which was slightly longer than the VP of figures that were defined by a luminance difference (luminance-defined figures [LDFs] or luminance figures) in the same random-dot pattern. VP is probably not only a retinal phenomenon but also a cortical one. Coherent movement of the dots over the whole display after the stimulus offset did not reduce the VP of motion figures. VP for the MDFs was longer than that for LDFs independently of the contrast of the stimulus figure as long as the stimuli could be seen clearly enough. Different mechanisms are most likely involved in the VP of MDFs and LDFs. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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