Hi all, I was wondering whether there are any plans to develop eye-tracking for online experiments. There is existing open-source web-based eye-tracking Javascript code: WebGazer.js: Democratizing Webcam Eye Tracking on the Browser and I was wondering whether it would be straightforward to integra…

Tricky. If I don’t get any useful error messages, I tend to debug using an almost experimental design; try different libraries, browsers, remove code, until I get something to work. @TabeaW , does my prototype also crash your browser? Here is a link to the runner: https://run.pavlovia.org/tpronk/demo…

I managed to implement the features I was aiming for. An improved version of the eye-tracking demo can be found at the link below. [image] Thomas Pronk / demo_eye_tracking2 Sign In/Register

I have not mentioned it in your prototype. This seems to work well. But the demo calibration of webgazer led to the same behavior. I opened an issue for the webgazer as it is not a pavlovia issue.

I see they’re already helping you out there. Good luck getting it ironed out!

This is seriously one of the biggest advancements in online data collecting I have seen in the last months. Thank you so much Thomas!

Little update on “prevent presenting calibration squares behind webcam thumbnail”. I changed my mind about how to achieve this. I’d like to hide the webcam thumbnail by default, only showing it when participant’s eyes are outside of the validation area. The validation area is that square you see wi…

Did you try version 2 (also in this thread)? That one hides the webcam thumbnail when the participant’s head is correctly positioned, thus working around this issue. Also has the calibration squares near the edges of the screen, regardless of the screen’s aspect ratio, which should make a slightly b…

O sorry you even mention you use the updated version. I’ll take a look on Monday

Much appreciated. I’m still quite wet behind the ears with coding properly. I’m messing around with the calibration trials and looking into the coding equivalent of “send to back” for the video thumbnail. I’ll keep messing around with it this weekend.

Eye-tracking development for Pavlovia

Blog

thomas_pronk October 28, 2020, 6:58am 24

Cross-linking a thread with questions about my prototype. Off-screen/on-screen gaze with WebGazer-based experiment on PsychoPy/Pavlovia

Topic		Replies	Views
Off-screen/on-screen gaze with WebGazer-based experiment on PsychoPy/Pavlovia Online experiments	11	2821	October 12, 2021
Integrating PsychoPy eye tracking with a cheap webcam on a desktop computer? Development eyetracking	3	538	January 13, 2026
Webcam based eyetracking with psychopy! Online experiments timing , eyetracking , pavlovia	7	3468	February 15, 2021
Gazepoint and PsychoPy 2024.1.5 Coding eyetracking	23	1326	May 22, 2025
Simulating eyetrackers Coding eyetracking	8	2508	April 14, 2021

Eye-tracking development for Pavlovia

Related topics