File:Phase shift.jpg: Difference between revisions

{{Fig|'''Phase shift''' graph displaying the degree of phase-shift ([https://supermemo.guru/wiki/Advanced_Sleep_Phase_Syndrome_(ASPS) ASPS] or [https://supermemo.guru/wiki/Delayed_Sleep_Phase_Syndrome_(DSPS) DSPS]) as well as its dependence on the time of the day and can be used to see the expected bedtime given a specific natural waking time. <span style{{=}}"padding: 3px; color: white; background-color: blue;">Blue line</span> shows the bedtime (vertical axis) for days with a given waking hour (horizontal axis). <span style{{=}}"padding: 3px; color: white; background-color: red;">Red line</span> shows the next day's waking hours (which are shifted by 1-2 hours in DSPS). <span style{{=}}"padding: 3px; background-color: fuchsia;">Fuchsia</span> and <span style{{=}}"padding: 3px; background-color: silver;">gray</span> lines indicate the siesta period. Even though the <span style{{=}}"padding: 3px; color: white; background-color: red;">red waking line</span> begins at the origin of the graph, it shows a substantial phase shift at later hours (DSPS). From the presented exemplary graph one can read that for the waking time equal to 7 am (horizontal axis), the expected time to go to bed, as indicated by the <span style{{=}}"padding: 3px; color: white; background-color: blue;">blue line</span>, is 1 am (vertical axis), while optimum siesta time occurs between 15:00 and 16:00. However, if the wake time is 11 am, the bedtime is likely to come only at 5 am the next day.}}