Experiment stacks when I use drift_correction

Dario

Hi everybody,

I did not find any similar question, so I post a new discussion with my problem.

I use the default Eye-Tracking Template on OpenSesame with sligth modifications to show some questions in the internal block.
The experiment stack always after the eye-tracker calibration with a black screen.
If I remove the drift_correction, it works fine until the end and save the logs correctly.

My Configuration:

• OpenSesame 3.1
• PyGaze for Tobii Pro SDK
• Tobii x60
• on WINDOWS 10

What can be the problem?
Are data without the drift correction not enough precise?

Thanks in advance

Elliot_Luo

Hi Dario,
I used Tobii x60 for experiment before and encountered the same problem.
drift_correction is quite problematic with Tobii, I spent some time trying to fix it but in vain.
My recommendation is NOT to use it.
In my experience, the quality of eye-tracking data is good enough if your stimuli is large (e.g., photos) but it may pose some problems if your experiment is about reading or text-related task (e.g., relation between reading comprehension and eye-movement, etc). Tobii x60 is not that precise when it comes to texts.
To get good data, it would be a good idea to ask the subject to produce as less movements as possible.

Hope that helps!
Elliot.