Table 1. Shows effects of making sequence of two saccades.
Greyed rows show RV sequences and white rows show VR sequences. 2-step first and second saccade latencies are compared with latencies for single saccade latencies with the second step latency effects shown regardless target shift (middle column) and as a function of the target shift (final column). 2-step first and second saccade accuracy is shown as a function of the direction needed to execute a correct movement. Note the blank middle column for accuracy was due to the effect of the second target position only being reported as a function of the shift in its position.
First of 2-step | Second of 2-step (regardless of 2nd target shift) | Second of 2-step (effect of 2nd target shift) | |
---|---|---|---|
Latency | R shorter (Fig 3) | V shorter (Fig 3) | V not affected (Fig 5) |
V shorter (Fig 3) | R shorter (Fig 3) | R shorter (Fig 5) | |
Accuracy | R not affected (Fig 4) | N/A | V distance and direction affected (Fig 5) |
V affected (Fig 4) | N/A | R distance affected not direction (Fig 5) |