Figure 1.

Effects of the ‘lockdown’ on social jetlag, social sleep restriction, sleep duration, and sleep quality.

Social jetlag (i.e., the difference between mid-sleep on free days and work days) is reduced by 13 minutes (A), and social sleep restriction (i.e., the difference in sleep duration between free days and work days) by 25 minutes (B). Sleep duration is increased by 13 minutes (C) while sleep quality (higher values denote decreased sleep quality) is reduced by 0.25 points on a scale from 0–25 (D). Reported differences are interpolated medians of individual differences. Each plot depicts the probability density of the data on top of a boxplot with overlying individual data points. Boxplots: lower and upper hinges correspond to the first and third quartiles (the 25th and 75th percentiles) and the thick vertical line in the box corresponds to the median. The upper (lower) whisker extends from the hinge to the largest (smallest) value no further than 1.5 ^∗ inter-quartile range (IQR, or distance between the first and third quartiles).