Table 2.
Actigraphic sleep measures during the 4 days, as well as 24 hours before each challenge task assessment. One-tailed paired t-tests were performed between nap and no-nap conditions.
| 4 days Before Assessments | Nap | No-Nap | Statistics | ||||
|---|---|---|---|---|---|---|---|
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| M | SD | M | SD | t | d | P | |
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| Daytime Sleep (Nap) | |||||||
| Days Napping (fell asleep) | 3.3 | 0.89 | 3.3 | 0.87 | −.43 | .00 | .67 |
| Lights-Out Time | 13:23 | 0:45 | 13:22 | 0:49 | .04 | .02 | .97 |
| Rise Time | 15:13 | 0:33 | 15:16 | 0:40 | −.23 | .08 | .82 |
| Time in Bed (minutes) | 110.3 | 19.6 | 113.9 | 15.2 | −1.05 | .21 | .31 |
| Sleep Start Time | 13:49 | 0:57 | 13:55 | 0:59 | −.35 | .10 | .73 |
| Sleep End Time | 15:12 | 0:51 | 15:14 | 0:52 | −.45 | .04 | .66 |
| Sleep Period (minutes) | 84.00 | 20.5 | 78.6 | 11.8 | −.49 | .32 | .63 |
| Sleep Efficiency (%) | 93.4 | 4.9 | 94.1 | 2.8 | −.99 | .18 | .35 |
| Nighttime Sleep | |||||||
| Lights-Out Time | 19:59 | 0:28 | 20:03 | 0:28 | −.80 | .14 | .44 |
| Rise Time | 6:51 | 0:27 | 6:53 | 0:25 | −.56 | .08 | .58 |
| Time in Bed (minutes) | 651.4 | 40.4 | 650.4 | 39.7 | .20 | .02 | .84 |
| Sleep Start Time | 20:40 | 0:33 | 20:41 | 0:35 | −.56 | .03 | .59 |
| Sleep End Time | 6:40 | 0:28 | 6:44 | 0:24 | −.70 | .15 | .50 |
| Sleep Period (minutes) | 599.5 | 41.9 | 602.9 | 39.3 | −.48 | .08 | .64 |
| Sleep Efficiency (%) | 85.2 | 3.8 | 83.4 | 5.0 | 1.93 | .41 | .08 |
| Total 24 h Sleep | |||||||
| Time in Bed (minutes) | 761.7 | 39.7 | 764.4 | 37.5 | −.45 | .07 | .66 |
| Sleep Period (minutes) | 682.3 | 40.2 | 681.5 | 33.6 | −.75 | .02 | .46 |
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| 24 h Before Assessments | M | SD | M | SD | t | D | P |
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|
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| Daytime Sleep (Nap) | |||||||
| Lights-Out Time | 13:16 | 0:41 | - | - | - | - | - |
| Rise Time | 15:06 | 0:53 | - | - | - | - | - |
| Time in Bed (minutes) | 110.3 | 20.4 | - | - | - | - | - |
| Sleep Start Time | 13:37 | 0:48 | - | - | - | - | - |
| Sleep End Time | 14:58 | 0:55 | - | - | - | - | - |
| Sleep Period (minutes) | 81.6 | 16.6 | - | - | - | - | - |
| Sleep Efficiency (%) | 94.6 | 3.0 | - | - | - | - | - |
| Nighttime Sleep | |||||||
| Lights-Out Time | 19:55 | 0:30 | 20:00 | 0:24 | −1.09 | .18 | .29 |
| Rise Time | 7:00 | 0:26 | 7:03 | 0:23 | −.29 | .12 | .77 |
| Time in Bed (minutes) | 665.3 | 44.3 | 662.6 | 33.8 | −1.1 | .07 | .31 |
| Sleep Start Time | 20:33 | 0:47 | 20:31 | 0:30 | −.42 | .05 | .69 |
| Sleep End Time | 6:51 | 0:30 | 6:54 | 0:31 | .59 | .10 | .57 |
| Sleep Period (minutes) | 617.7 | 53.7 | 623.2 | 39.3 | −.49 | .12 | .63 |
| Sleep Efficiency (%) | 87.4 | 5.6 | 84.0 | 7.8 | 1.27 | .50 | .24 |
| Total 24 h Sleep | |||||||
| Time in Bed (minutes) | 761.7 | 39.7 | 662.6 | 33.8 | 11.3 | 2.7 | .001 |
| Sleep Period (minutes) | 682.3 | 40.2 | 623.2 | 39.3 | 7.6 | 1.5 | .001 |