Re-calibration of eye-tracker during the experiment
I am programming an eye-tracking change-detection experiment using OpenSesame 3.0.7 on an old Tobii120 machine.
I am using the wonderful Python code by Hiroyuki Sogu to interface with the Tobii SDK. I got a basic experiment running, and it seems to be collecting decent data. However, there are couple of things that I have still not yet fully understood: (a) say I want to re-calibrate my participant, every so often, for example, by pressing a key on the keyboard (and call the eye-tracker), is there a way I could do it without interrupting the experiment, and risk to loose it all? (b) is it possible to perform drift correction for every trial? TobiiController does not look like it allows that ... (c) is there a way I could somehow monitor whether the gaze of my participant drifted completely off during the course of the experiment? (I have two screens connected to my Tobii machine).
Thanks a lot for your time!