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. 2021 Jun 18;23(6):e26004. doi: 10.2196/26004

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©Jennifer Ferrar, Gareth J Griffith, Caroline Skirrow, Nathan Cashdollar, Nick Taptiklis, James Dobson, Fiona Cree, Francesca K Cormack, Jennifer H Barnett, Marcus R Munafò. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 18.06.2021.

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 the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on https://www.jmir.org/, as well as this copyright and license information must be included.

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Mean psychomotor vigilance task reaction time (across all participants) as a function of the time of day (morning vs evening) and study day (day 1 to day 14). PVT: psychomotor vigilance task.