## 3 Results
\begin{table}
\begin{tabular}{l c c c c c c c c c c} \hline \hline
**Division** & **Two RT** & \multicolumn{2}{c}{**Two CT**} & \multicolumn{2}{c}{**Differences**} & **Their** & **RT \(\boldsymbol{<7}\)** & **RT \(\boldsymbol{\geq 7}\)** & **Difference** & **With** \\ \hline
**Sleep Time** & \(\boldsymbol{<7}\) & \(\geq\)7 & **MT** & **ET** & \(\geq\)7-\(\boldsymbol{<7}\) & **ET-MT** & **Sum** & **MT** & **ET** & \(\geq\)**7 ET-\(\boldsymbol{<7}\)** & **Sum** \\ \hline Simulation: & & & & & & & & & & & \\ Weekday BT & 22.79 & 24.06 & 22.96 & 23.89 & 1.27 & 0.93 & 2.20 & 22.26 & 24.46 & 2.20 & 0.00 \\ Weeked BT & 24.08 & 24.79 & 23.69 & 1.18 & 0.71 & 1.49 & 2.20 & 22.99 & 1.19 & 2.20 & 0.00 \\ Difference BT & 1.29 & 0.73 & 0.73 & 1.29 & \(-\)0.56 & 0.56 & 0.00 & 0.73 & 0.73 & 0.00 & 0.00 \\ Weekday RT & 6.10 & 7.80 & 6.70 & 7.20 & 1.70 & 0.50 & 2.20 & 6.00 & 8.20 & 2.20 & 0.00 \\ Weekend RT & 8.84 & 9.65 & 8.55 & 9.94 & 0.81 & 1.39 & 2.20 & 7.85 & 10.05 & 2.20 & 0.00 \\ Difference RT & 2.74 & 1.85 & 1.85 & 2.74 & \(-\)0.89 & 0.89 & 0.00 & 1.85 & 1.85 & 0.00 & 0.00 \\ Weekday TIB & 7.31 & 7.74 & 7.74 & 7.31 & 0.43 & \(-\)0.43 & 0.00 & 7.74 & 7.74 & 0.00 & 0.00 \\ Weekend TIB & 8.76 & 8.86 & 8.86 & 8.76 & 0.10 & \(-\)0.10 & 0.00 & 8.86 & 8.86 & 0.00 & 0.00 \\ Difference TIB & 1.45 & 1.12 & 1.12 & 1.45 & \(-\)0.32 & 0.32 & 0.00 & 1.12 & 1.12 & 0.00 & 0.00 \\ Lectures (n): & (138) & (107) & (138) & (107) & & & (98) & (67) & & \\ Weekday BT & 23.16 & 24.17 & 23.07 & 24.26 & 1.01 & 1.20 & 2.20 & 22.65 & 24.85 & 2.20 & 0.00 \\ Weekend BT & 23.97 & 24.73 & 23.62 & 1.08 & 0.77 & 1.45 & 2.22 & 23.13 & 1.35 & 2.22 & 0.00 \\ Difference BT & 0.81 & 0.57 & 0.56 & 0.82 & \(-\)0.24 & 0.26 & 0.02 & 0.49 & 0.50 & 0.02 & 0.00 \\ Weekday RT & 6.17 & 7.84 & 6.76 & 7.25 & 1.67 & 0.49 & 2.16 & 6.01 & 8.17 & 2.16 & 0.00 \\ Weekend RT & 8.74 & 9.50 & 8.41 & 9.82 & 0.76 & 1.40 & 2.16 & 7.98 & 10.14 & 2.16 & 0.00 \\ Difference RT & 2.57 & 1.65 & 1.65 & 2.57 & \(-\)0.91 & 0.91 & 0.00 & 1.97 & 1.97 & 0.00 & 0.00 \\ Weekday TIB & 7.01 & 7.68 & 7.70 & 6.99 & 0.67 & \(-\)0.71 & \(-\)0.04 & 7.36 & 7.32 & \(-\)0.04 & 0.00 \\ Weekend TIB & 8.77 & 8.76 & 8.79 & 8.74 & \(-\)0.01 & \(-\)0.05 & \(-\)0.06 & 8.85 & 8.79 & \(-\)0.06 & 0.00 \\ Difference TIB & 1.76 & 1.09 & 1.10 & 1.75 & \(-\)0.67 & 0.66 & \(-\)0.02 & 1.48 & 1.47 & \(-\)0.02 & 0.00 \\ Students (n): & (773) & (747) & (521) & (999) & & & & (296) & (522) & & \\ Weekday BT & 23.83 & 24.22 & 23.39 & 24.66 & 0.40 & 1.28 & 1.67 & 23.24 & 24.91 & 1.67 & 0.00 \\ Weekend BT & 24.50 & 1.04 & 24.02 & 1.51 & 0.54 & 1.49 & 2.03 & 23.87 & 1.91 & 2.03 & 0.00 \\ Difference BT & 0.67 & 0.82 & 0.64 & 0.85 & 0.15 & 0.22 & 0.36 & 0.63 & 1.00 & 0.36 & 0.00 \\ Weekday RT & 6.09 & 7.93 & 6.90 & 7.11 & 1.84 & 0.21 & 2.04 & 6.02 & 8.06 & 2.04 & 0.00 \\ Weekend RT & 9.49 & 10.28 & 9.16 & 10.62 & 0.79 & 1.46 & 2.25 & 8.80 & 11.05 & 2.25 & 0.00 \\ Difference RT & 3.41 & 2.36 & 2.25 & 3.51 & \(-\)1.05 & 1.26 & 0.21 & 2.78 & 2.99 & 0.21 & 0.00 \\ Weekday TIB & 6.26 & 7.67 & 7.52 & 6.41 & 1.40 & \(-\)1.11 & 0.30 & 6.78 & 7.08 & 0.30 & 0.00 \\ Weekend TIB & 9.00 & 9.21 & 9.14 & 9.07 & 0.21 & \(-\)0.07 & 0.14 & 8.93 & 9.07 & 0.15 & 0.00 \\ Difference TIB & 2.74 & 1.55 & 1.62 & 2.66 & \(-\)1.19 & 1.04 & \(-\)0.15 & 2.15 & 2.00 & \(-\)0.15 & 0.00 \\ \hline \hline \end{tabular} Notes. RT: risetime; BT: bedtime; TIB: time in bed. Difference BT (or RT or TIB): Difference between weekend and weekday in BT (or in RT or in TIB). Sleep times from four-way ANOVAs for subdivisions into two weekday RTs (\(<\)7 and \(\geq\)7 a.m.), two chronotypes (CTs: morning type and evening type, MT and ET, respectively), and into two CT \(\times\) RT (MT with RT \(<\)7 and ET with RT \(\geq\)7): Differences (\(\geq\)7-\(\zeta\)7, ET-MT, and \(\zeta\)7 ET-\(\geq\)7 MT): difference between the subdivisions in sleep time; Their sum: sum of two differences for subdivisions into two RTs and into two CTs; (in: number of participants. The independent factors: “RT” (either \(<\)7 or \(\geq\)7 a.m.), “CT” (either MT or ET), “Age” (either lecturers or university students), and “Survey” (see online surveys 1-4, in Table 1 and Table S1). See also illustrations of the paired simulations in Figure 1 and their fit with data in Figure 4.  
\end{table}