Data driven group comparisons of eye fixations to dynamic stimuli

Onwuegbusi, Tochukwu, Hermens, Frouke and Hogue, Todd (2021) Data driven group comparisons of eye fixations to dynamic stimuli. The Quarterly Journal of Experimental Psychology . ISSN 1747-0218

Full content URL: https://doi.org/10.1177/17470218211048060

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Data driven group comparisons of eye fixations to dynamic stimuli
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Abstract

Recent advances in software and hardware have allowed eye tracking to move away from static images to more ecologically relevant video streams. The analysis of eye tracking data for such dynamic stimuli, however, is not without challenges. The frame by frame coding of regions of interest (ROIs) is labour intensive, and computer vision techniques to automatically code such ROIs are not yet mainstream, restricting the use of such stimuli. Combined
with the more general problem of defining relevant ROIs for video frames, methods are needed that facilitate data analysis. Here we present a first evaluation of an easy-to-implement data-driven method with the potential
to address these issues. To test the new method, we examined the differences in eye movements of self-reported politically left- or right-wing leaning participants to video clips of left- and right-wing politicians. The results show
that our method can accurately predict group membership on the basis of eye movement patterns, isolate video clips which best distinguish people on the political left-right spectrum and reveal the section of each video clip
with the largest group differences. Our methodology thereby aids the understanding of group differences in gaze behaviour, and the identification of critical stimuli for follow-up studies or for use in saccade diagnosis.

Keywords:Eye movements, Eye tracking, Dynamic stimuli, Group comparisons, Saccade diagnosis
Subjects:C Biological Sciences > C800 Psychology
C Biological Sciences > C850 Cognitive Psychology
C Biological Sciences > C830 Experimental Psychology
C Biological Sciences > C810 Applied Psychology
C Biological Sciences > C880 Social Psychology
C Biological Sciences > C840 Clinical Psychology
Divisions:College of Social Science > School of Psychology
ID Code:46439
Deposited On:13 Sep 2021 11:30

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