Fig 5. Shows the effect of the second saccade target position shift on second saccade target latency and accuracy.

The effect of second saccade target position shifts in distance (towards or away from the first saccade target position with negative numbers showing the shift towards the first target location) is shown on the left and that from shifts in direction (shifts clockwise or counter clockwise of the first target position) is shown on the right. The upper row shows the average of the median saccade latencies (ms) for 2-step movements. The lower row shows second saccade accuracy in terms of the deviation from that required for the second saccade to land on the original second target location. For shifts in distance this is shown by the difference between the amplitude of the second saccade relative to that required to land on the original target location. For shifts in direction this is shown by the difference between the angle of the second saccade relative to that required to land on the target (positive values here are coded as being towards the location of the shifted second target position and negative away). Error bars are between participants’ error bars.