I’m running a couple of online experiments. All of them are run in fullscreen and the mouse is set to be invisible by using this code at the beginning of the experiment.
// Hide cursor document.body.style.cursor='none';
I’ve run around 30 participants and around 5 people reported that the mouse went visible during part of the experiment and then disappeared again after some trials. Also, most of them were using a Mac and Google Chrome and one of them was using Windows 10. I really don’t know how to look more deeply into this as I don’t see any patter in the people that reported seeing the mouse pointer. Any thoughts?