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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. 7 — Gaze position during facial movement. Approximately 40 s of representative gaze position data during the facial movement conditions for each of the head-worn eye-tracking setups (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). Each of the panels is divided into three periods denoting the movements executed by the participant (labeled None [white background], Vowels [gray background] and Eyebrows [white background, referring to the facial expression condition]). All panels show data from the same participant. Positive is rightward for the horizontal gaze coordinate and downward for the vertical gaze coordinate. (0,0) denotes gaze toward central gaze target