Table 2.
Mean and SEM (in brackets) for each of the control measures and the working memory test for the wake group and the sleep group.
| Wake group mean (SEM) | Sleep group mean (SEM) | |
|---|---|---|
| SSS – 11 | 2.25 (0.14) | 2.32 (0.14) |
| SSS – 21 | 3.15 (0.15) | 3.42 (0.14) |
| SSS – 31 | 4.43 (0.19) | 4.32 (0.17) |
| SSS – 41 | 3.28 (0.17) | 2.84 (0.15) |
| SSS – 51 | 3.42 (0.20) | 2.89 (0.18) |
| PVT – 12 | 3.19 (0.033) | 3.29 (0.038) |
| PVT – 22 | 3.22 (0.038) | 3.29 (0.041) |
| PVT – 32 | 3.21 (0.048) | 3.24 (0.046) |
| PVT – 42 | 3.23 (0.038) | 3.26 (0.051) |
| PVT – 52 | 3.25 (0.047) | 3.33 (0.044) |
| PVT – 1 (lapses) | 0.55 (0.15) | 0.68 (0.12) |
| PVT – 2 (lapses) | 0.53 (0.12) | 0.58 (0.13) |
| PVT – 3 (lapses) | 0.63 (0.28) | 0.74 (0.22) |
| PVT – 4 (lapses) | 0.77 (0.30) | 0.77 (0.20) |
| PVT – 5 (lapses) | 0.74 (0.30) | 0.46 (0.17) |
| OSPAN (absolute) | 46.6 (2.88) | 43.2 (2.7) |
| OSPAN (partial) | 61.3 (1.99) | 60.4 (1.6) |
| RWT (total score) | 41.3 (1.14) | 39.9 (1.3)1 |
1
Stanford Sleepiness Scale (SSS) from 1 (wide awake) to 8 (asleep).
2
Reaction speed (defined as 1/reaction time).