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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. 6 — Data quality measures as a function of gaze target location. Heatmaps showing deviation (first row), RMS-S2S (second row), STD (third row), and data loss (fourth row) as a function of gaze target location 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), for the first validation moment at the start of a recording. In each panel, every square represents a gaze target location and the color of the square corresponds to the value determined for the given measure at that gaze target location (e.g., the top-left square in each panel indicates the data quality for the top-left gaze target). The non-central gaze targets were at horizontal eccentricities of 17^∘ and vertical eccentricities of 11^∘. Coloring of the squares is according to the color bar legend shown on the right of each row