Table 2.
Alertness
| Mar | May | July | Sept | Nov | p | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SEM | Mean | SEM | Mean | SEM | Mean | SEM | Mean | SEM | ||
| Morning | |||||||||||
| MRT (ms) | 284 | 8 | 290 | 15 | 284 | 11 | 282 | 11 | 286 | 13 | 0.470 |
| SRT (ms) | 83 | 10 | 129 | 22 | 111 | 23 | 93 | 18 | 94 | 19 | 0.917 |
| FRT (ms) | 209 | 5 | 205 | 6 | 204 | 4 | 205 | 4 | 206 | 6 | 0.161 |
| IRT (1/ms) | 2.36 | 0.08 | 2.27 | 0.11 | 2.48 | 0.17 | 2.45 | 0.15 | 2.36 | 0.17 | 0.839 |
| LRT (%) | 2.2 | 0.5 | 4.6 | 1.9 | 2.5 | 0.8 | 2.4 | 0.8 | 3.0 | 0.9 | 0.615 |
| Evening | |||||||||||
| MRT (ms) | 294 | 13 | 291 | 16 | 305 | 21 | 292 | 12 | 301 | 20 | 0.869 |
| SRT (ms) | 130 | 25 | 124 | 26 | 107 | 26 | 92 | 19 | 112 | 25 | 0.325 |
| FRT (ms) | 209 | 8 | 203 | 5 | 209 | 6 | 210 | 5 | 210 | 8 | 0.382 |
| IRT (1/ms) | 2.24 | 0.13 | 2.38 | 0.19 | 2.28 | 0.21 | 2.39 | 0.14 | 2.35 | 0.22 | 0.601 |
| LRT (%) | 3.6 | 0.8 | 3.4 | 1.4 | 4.5 | 2.0 | 2.3 | 0.8 | 4.9 | 2.2 | 0.805 |
MRT: mean response times for all trials; SRT: standard deviation of the response times for all trials; FRT: fastest 10% of response times for all trials; IRT: slowest 10% of reciprocal response times for all trials; LRT: percentage of response times ≥ 500 ms for all trials. All variables showed non-significant differences between measurements. Repeated measures ANOVA followed by post-hoc Bonferroni test.