Abstract
The effect of the spatial frequency of a vertically oriented, horizontally moving stripe pattern on perceived speed was investigated. Perceived velocity increased linearly with both angular speed and spatial frequency. The spatial frequency effect was independent of the relative angular width of light and dark stripes and was also found to apply to the case of a single moving bar. Evidence for weighted frequency averaging was obtained for more complex patterns. The results are consistent with a model involving both a spatial frequency dependent input mediated by temporal frequency and an angular speed input relating to the movement of a single edge through the visual field.
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