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. 2020 Mar 23;52(5):2098–2121. doi: 10.3758/s13428-020-01363-x

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© The Author(s) 2020

Open Access This 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 — Data plots of this kind were used for visual assessment of the resolution of the eye-trackers. The plot shows EyeLink 1000+ data from the staircase script with 10 steps each of amplitudes 1^′ to 10^′. The smallest detectable movements are 3-4 minutes of arc. One amplitude magnification and two shrinkage areas are indicated with dashed lines.