Saving time of first mouse movement

[wakecarter]

What you can do is ask participants to click on something in the centre of the screen to get them to move their mouse back to the centre.

Setting mouse position online

My sense (after a quick google) is that this isn’t possible in JS, and could be a nightmare if it were (advertisers stealing your mouse to “encourage” clicking on particular buttons). While we try to mimic the Python engine as much as possible some things will never be quite the same in browser studies.