Measuring time spent on page in milliseconds

Question

Hi,

I have some math tasks that serve as a proxy for knowledge needed to solve some reasoning tasks, and i need the time it took them to read and solve the task measured in milliseconds. In short, I need to measure time spent on a page from the moment a page loaded to the moment participant clicked the "next" button, but measured more precisely than sosci already does it (it gives seconds). I need this for thirty pages (one task per page). Can you please tell me how to do this because i don't really follow the explanation on the page with latencyTimer instructions. I suppose i will need internal variable for each page, but I'm not sure how to write the code for this.

Thank you in advance

Comments

> i don't really follow the explanation on the page with latencyTimer instructions

Okay, then let's start here: Where is the first point where you cannot follow the instructions?