Table 1.
Self-reported typical sleep quality indicators in Naturally-Experienced Sleep and Total Sleep Deprivation groups.
| Naturally-Experienced Sleep | Total Sleep Deprivation | Total | |
|---|---|---|---|
| M (SD) | M (SD) | M (SD) | |
| Nightly total sleep time (mins) | 419.40 (50.40) | 431.40 (69.00) | 425.40 (60.00) |
| Amount of sleep needed to feel refreshed (mins) | 439.80 (106.80) | 398.40 (153.60) | 418.20 (133.20) |
| Insomnia Severity Index (ISI) | 5.12a (3.15) | 3.91a (2.99) | 4.50a (3.09) |
| Number of nightly awakenings | 0.50 (0.53) | 0.50 (0.71) | 0.50 (0.61) |
Note. All data were self-reported on pre-study screening questionnaires. No significant differences were found between groups according to independent-groups t tests (not shown).
a
Corresponds to no clinical insomnia.