A global quantification of “normal” sleep schedules using smartphone data by Olivia J. Walch, Amy Cochran, and Daniel B. Forger Science Volume 2(5):e May 6, 2016 Published by AAAS
Fig. 1 Demographics of the surveyed set and validation. Olivia J. Walch et al. Sci Adv 2016;2:e Published by AAAS
Fig. 2 Solar mediation of sleep. Olivia J. Walch et al. Sci Adv 2016;2:e Published by AAAS
Fig. 3 Country effects on sleep duration act through bedtime. Olivia J. Walch et al. Sci Adv 2016;2:e Published by AAAS
Fig. 4 Differential sensitivity to sunrise and sunset across subpopulations and population-level differences. Olivia J. Walch et al. Sci Adv 2016;2:e Published by AAAS