Peri-saccadic visual motion and saccade accuracy estimation T L Watson |
|---|
Foundational Processes of Behaviour, University of Western Sydney, Australia
|
| It has been suggested that stimuli not perceived during a saccade may still serve a visual function. Visual motion that does not match that expected to be generated by making a saccade may be useful for estimating saccade endpoint errors and inducing subsequent corrective saccades. This was tested by presenting a brief moving dot field stimulus during a saccade, moving with or against the saccade. It was predicted that the motion may induce a catch-up saccade to correct for the unexpected peri-saccadic visual motion and that the direction of the saccade would match that of the direction of the visual motion. This was not found to be the case. Corrective saccades were made on approximately half of all trials however the number and direction of these saccades did not depend on the direction of peri-saccadic motion. Additionally, there was no difference in the size of the corrective saccade depending on the distance travelled by the motion stimulus. This suggests that visual motion generated by making a saccade is not used to estimate post saccade fixation accuracy. |
| Up Home |
|---|