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. 2020 Jan 2;52(3):1140–1160. doi: 10.3758/s13428-019-01307-0

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© The Author(s) 2019

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 8 — Accuracy and data loss during facial movement. Left panel: Mean deviation of reported gaze position averaged across participants for each head-worn eye-tracking setup (Tobii: Tobii Glasses 2 + firmware version 1.25.3-citronkola; Grip: Pupil headset + EyeRecToo (Grip/PuReST); Pupil-labs: Pupil headset + Pupil Capture; and SMI: SMI ETG2 + iViewETG) for the no movement baseline (labeled as None), vowels (Vowels), and facial expression (Eyebrows) facial movement conditions. Right panel: Mean data loss, the percentage of missing samples, averaged across participants for each eye-tracking setup. The error bars denote 95% confidence intervals, indicating variation across participants. Plotted values have been horizontally jittered for legibility