Table 1. Questionnaire data.
Group means and standard deviations of questionnaire data.
| Young Adults | Older Adults | Age Differences | |||
|---|---|---|---|---|---|
| n | M (SD) | n | M (SD) | (p-value) | |
| BDI | 15 | 7.33 (8.55) | 17 | 4.76 (5.25) | 0.42 |
| ESS | 17 | 8.18 (3.09) | 18 | 7.72 (3.08) | 0.36 |
| MEQ | 17 | 47.53 (11.21) | 13 | 59.08 (10.30) | 0.02 |
| PSQI | 17 | 4.70 (2.47) | 16 | 4.56 (1.41) | 0.95 |
| SSS-1 | 17 | 2.29 (0.69) | 18 | 2.11 (0.76) | 0.46 |
| SSS-2 | 17 | 2.35 (1.17) | 18 | 1.94 (0.80) | 0.38 |
| SSS-3 | 17 | 2.41 (0.87) | 16 | 2.00 (0.73) | 0.19 |
| SSS-4 | 16 | 2.94 (1.24) | 16 | 2.13 (0.89) | 0.08 |
| PTA-1 | 16 | 4.06 (3.32) | 15 | 3.67 (2.47) | 0.71 |
| PTA-2 | 14 | 4.29 (3.32) | 15 | 2.47 (2.75) | 0.12 |
BDI – Beck Depression Inventory; ESS – Epworth Sleepiness Scale; MEQ – Morning-Eveningness Questionnaire; PSQI – Pittsburgh Sleep Quality Index; SSS – Stanford Sleepiness Scale (SSS-1: nap encoding; SSS-2: nap delayed test; SSS-3: wake encoding; SSS-4: wake delayed test); PTA – Post Task Awareness (PTA-1: nap condition; PTA-2: wake condition); n – number of participants with available data; M – mean; SD – standard deviation.