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Saccade initiation time relative to the time of the bounce, as a function of ball speed. Negative values indicate the time before the bounce. Circles indicate the occlusion condition, and triangles indicate normal trials. Filled symbols indicate that normal trials were done first. Open symbols indicate that the occlusion trials were done first. Error bars are ±1 s.e.m. between subjects. For clarity, the data points have been slightly offset along the abscissa.
