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Joan Lopez-Moliner, Daniel Linares; Perceived duration is shortened after motion direction changes. Journal of Vision 2007;7(9):377. doi: 10.1167/7.9.377.
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Recently it has been shown that the misbinding between color and motion also appears with a single change of motion direction. This finding, mainly observed for changes of direction of 180 degs, implies that motion direction takes longer to acknowledge than the concomitant change of color and is regarded as there being a role for motion opponency mechanisms in the core of color motion asynchrony illusions. So as to better understand the underpinnings of color-motion asynchronies we here test the hypothesis that the duration itself of an interval defined by a new motion direction is perceived shorter after a direction change of 180 degs in comparison to durations after changes of 90 degs. By using life-limited random dots we find that the perceived duration of a motion interval is shortened (about 60 ms) when its direction follows a change of 180 degs. This result turns out to be independent of motion coherence after comparing two motion coherence conditions (50% and 100%).
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