Table 1.
Means and standard errors for sleep schedule and period prior to and during the normal and restriction conditions.
| Sleep Schedule and Period | Sleep | Condition | t-value |
|---|---|---|---|
| Normal | Restriction | ||
| Wednesday & Thursday | |||
| Reported Bedtime | 10:00 p.m. ± 13.04 | 10:08 p.m. ± 9.59 | −0.70 |
| Sleep Onset Time | 10:39 p.m. ± 12.73 | 10:47 p.m. ± 13.27 | −0.75 |
| Total Sleep Minutes | 413.75 ± 14.18 | 380.31 ± 13.69 | 3.26** |
| Wake Minutes | 31.72 ± 5.02 | 40.83 ± 6.80 | −2.39* |
| Awakening Time | 6:04 a.m. ± 11.62 | 5:51 a.m. ± 15.13 | 1.54 |
| Sleep Period | 455.03 ± 13.86 | 439.67 ± 17.53 | 0.12 |
| Friday – Manipulation | |||
| Awakening Time (Fri) | 6:09 a.m. ± 13.29 | 6:06 a.m. ± 14.80 | 1.46 |
| Reported Bedtime | |||
| 10:00 pm / 2:00 am | 9:55 p.m. ± 7.14 | 1:54 a.m. ± 7.88 | −61.43*** |
| 11:00 pm / 3:00 am | 11:13 p.m. ± 8.81 | 3:13 a.m. ± 8.81 | −19.24*** |
| Sleep Onset Time | |||
| 10:00 pm / 2:00 am | 10:31 p.m. ± 11.35 | 1:59 a.m. ± 7.47 | −15.28*** |
| 11:00 pm / 3:00 am | 11:38 p.m. ± 14.86 | 3:13 a.m. ± 9.85 | −19.33*** |
| Total Sleep Minutes | 401.67 ± 12.32 | 209.39 ± 8.44 | 20.06*** |
| Wake Minutes | 38.61 ± 5.46 | 16.94 ± 5.28 | 3.58** |
| Awakening Time (Sat) | |||
| 6:00 am | 5:48 a.m. ± 8.08 | 5:52 a.m. ± 7.25 | −0.75 |
| 7:00 am | 7:01 a.m. ± 12.42 | 6:55 a.m. ± 11.42 | 0.45 |
| Sleep Period | 449.83 ± 8.41 | 239.78 ± 5.43 | 26.67*** |
Note: Sleep period refers to time in bed (bedtime to awakening time). Total sleep minutes refer to actual sleep between sleep onset and wake time excluding minutes awake after sleep onset. df = 17. * p < 0.05, ** p < 0.01, two-tailed. *** p < 0.001, two-tailed.