Table 3.
Comparison of State Upon Waking up After Sleep on Each Mattress
| Soft | Medium | Firm | F | P | |
|---|---|---|---|---|---|
| KSS | 5.17±0.35 | 5.33±0.28 | 4.75±0.45 | 3.67 | 0.42 |
| Discomfort | 2.33 ± 2.19 | 1.75 ±1.36 | 3.33 ± 2.15 | 3.03 | 0.07 |
| PVT | |||||
| RT | 281.96±12.60 | 274.57±8.36 | 273.34±7.99 | 0.75 | 0.49 |
| 10%FRT | 215.12±7.87 | 208.76±7.18 | 213.37±6.13 | 0.70 | 0.51 |
| 10%LRT | 386.17±16.72 | 381.50±14.99 | 381.89±12.51 | 0.09 | 0.89 |
| Lapses | 1.67±0.78 | 1.17±0.53 | 1.67±0.57 | 0.31 | 0.73 |
Notes: All measurement are reported as mean ± SEM; n= 12; *p < 0.05.
Abbreviations: KSS, the Karolinska Sleepiness Scale; PVT, Psychomotor Vigilance Test; RT, Reaction Time; 10%FRT, the average of the fastest 10% response times; 10%LRT, the average of the slowest 10% response times; Lapses, the number of errors (trials with RT > 500 ms).