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. 2019 Jun 3;8(6):e12940. doi: 10.2196/12940

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©Erik Grasaas, Liv Fegran, Sølvi Helseth, Jennifer Stinson, Santiago Martinez, Chitra Lalloo, Kristin Haraldstad. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 03.06.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on http://www.researchprotocols.org, as well as this copyright and license information must be included.

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Adjective ratings, acceptability ranges, and school grading scales, in relation to the average System Usability Scale (SUS) score. Source: Bangor et al. Used with permission by the original publishers [42].