Over the past years, we have used a self-built (by Tim Cornelissen) dual eye-tracking setup in our lab to investigate eye movements during dyadic interaction. Through a recent grant, we have had an updated version constructed by a professional constructor. The setup is back in a nice black metal look:
Here is a short example of the videos and eye-tracking data recorded using this setup:
In order to map eye-tracking data recorded at one side of the dual eye-tracking setup unto the video recorded at the other end, we use an automatic Area-of-Interest construction method based on Voronoi Tesselation and OpenFace facial landmark detection. It is freely available at the OpenScienceFramework.
The method is validated in:
Hessels, R. S., Benjamins, J. S., Cornelissen, T. H. W., & Hooge, I. T. C. (2018). A Validation of Automatically-Generated Areas-of-Interest in Videos of a Face for Eye-Tracking Research. Frontiers in Psychology, 9(1367), 1–8. http://doi.org/10.3389/fpsyg.2018.01367