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. Author manuscript; available in PMC: 2021 May 1.
Published in final edited form as: J Psychosom Res. 2020 Mar 4;132:109992. doi: 10.1016/j.jpsychores.2020.109992

Fig. 1. Study protocol.

Fig. 1.

All individuals completed a 6-hour light exposure prior to sleep on Day 1 as part of an unrelated study. All participants slept 8 hours on Night 1 and 5 hours on Night 2. The randomization of what they were informed resulted in two study groups: (1) Night 1 – slept 8 hours, duration informed (DI) 8 hours; Night 2 – slept 5 hours, DI 8 hours (n=8; Fig 1A); (2) Night 1 – slept 8 hours, DI 5 hours; Night 2 – slept 5 hours, DI 5 hours (n=8; Fig 1B). Cognitive batteries were completed hourly during the day after the 8-hour sleep opportunity (on ▼DI = 8 h group; ▲ DI=5 h group) or after the 5-hour sleep opportunity (on ᐁDI = 8 h group;Δ DI=5 h group). Symbols are maintained across all plots. (D/C = Discharge).