Hi all
For an economic online experiment I would like to implement a PVT-B reaction test. I'll the page to be showing a rectangle or circle that is empty, after a specified time numbers should appear that count upwards until the participant clicks on the geometrical form with his mouse (something like this).
Has anybody ever done this and could help me? I have seen posts about timing features on Qualtrics, but since I need to capture the time between the numbers starting to count and the mouse click I do not really know how to start.

Thanks a lot in advance!
Best, Arto