Daytime enhancement only occurs for overall reaction time
| Instruction | Daytime change general skill (ms) | Overnight change general skill (ms) | Daytime change sequence-specific (ms) | Overnight change sequence-specific (ms) |
|---|---|---|---|---|
| Incidental day first (n = 9) | Mean, 23.8; SD, 7.9; t = 9.07; p < 0.0001* | Mean, 1.2; SD, 15.1; t = 0.23; p = 0.82 | Mean, 2.1; SD, 13.5; t = 0.47; p = 0.65 | Mean, −0.33; SD, 20.1; t = −0.05; p = 0.96 |
| Intentional day first (n = 6) | Mean, 25.8; SD, 13.3; t = 4.75; p < 0.006* | Mean, 0.1; SD, 21.7; t = 0.01; p = 0.99 | Mean, −16.8; SD, 23.7; t = −1.74; p = 0.14 | Mean, −5.8; SD, 15.5; t = −0.91; p = 0.41 |
| Incidental night first (n = 9) | Mean, 25.5; SD, 13.9; t = 5.50; p < 0.001* | Mean, 7.7; SD, 13.7; t = 1.68; p = 0.13 | Mean, 0.83; SD, 17.3; t = 0.14; p = 0.88 | Mean, −5.3; SD, 15.0; t = −1.05, p = 0.32 |
| Intentional night first (n = 8) | Mean, 16.3; SD, 12.8; t = 3.59; p < 0.009* | Mean, 2.2; SD, 13.8; t = 0.45; p = 0.67 | Mean, −5.44; SD, 14.6; t = −1.1; p = 0.33 | Mean, −6.1; SD, 22.7; t = −0.75; p = 0.48 |
| Diurnal control (A.M.) (n = 9) | Mean, 23.1; SD, 16.8; t = 4.14; p < 0.004* | Mean, 3.7; SD, 17.9; t = 0.62; p = 0.55 | ||
| Diurnal control (P.M.) (n = 9) | Mean, 18.7; SD, 12.2; t = 4.60; p < 0.002* | Mean, 2.7; SD, 9.5; t = 0.84; p = 0.43 |
Asterisks denote a significant difference of p < 0.01.