Table 2.
Mean response time (RT) in ms and percentage of errors for different stimuli presentations (no cue, valid cue, and invalid cue) for personnel on board Navy vessels after exposure to different equivalent noise levels (in quartiles)
| Equivalent noise exposure levels [dB(A)] measured before the cognitive performance test | |||||
|---|---|---|---|---|---|
| <72.6 | 72.6-77.0 | 77.1-85.2 | >85.2 | P valuea | |
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | ||
| RT (ms)No cue | 371 (36) | 372 (35) | 377 (34) | 380 (40) | 0.84 |
| RT (ms)Valid cue | 285 (33) | 289 (30) | 294 (28) | 298 (39) | 0.57 |
| RT (ms)Invalid cue | 357 (40) | 349 (32) | 361 (31) | 362 (42) | 0.65 |
| Errors (%)No cue | 2.4 (3.3) | 1.9 (4.1) | 2.2 (3.3) | 2.0 (3.0) | 0.97 |
| Errors (%)Valid cues | 3.7 (4.9) | 2.7 (2.5) | 2.7 (2.8) | 2.7 (2.1) | 0.71 |
| Errors (%)Invalid cues | 8.5 (10.1) | 3.6 (4.2) | 6.1 (5.9) | 5.1 (4.5) | 0.10 |
aANOVA