Protocol for gaze estimation using facial orientation in marmosets during a social preference test

Here, we present an open-source platform for evaluating social preference in common marmosets using image-based visual stimuli and gaze estimation. We describe the procedures for setting up the behavioral test, training marmosets to perform the test, and analyzing the resulting data with the provided code. This platform enables simple and noninvasive assessment of social attention toward social visual stimuli. For complete details on the use and execution of this protocol, please refer to Harbers et al.¹.