Table 4.
Mean and standard deviation results of analysis of physiological features in engine assembly.
| Physiological Metrics |
Expertise Group 1 | Rest (B) 2 |
Housing (LC) 2 |
Gear (MC) 2 |
Rotor and Cover (HC) 2 |
|---|---|---|---|---|---|
| Baselined peak pupil dilation (mm) 3 |
E | 0.000 ± 0.000 | 0.457 ± 0.270 | 0.626 ± 0.253 | 0.484 ± 0.282 |
| N-E | 0.000 ± 0.000 | 0.631 ± 0.469 | 0.706 ± 0.419 | 0.736 ± 0.682 | |
| Baselined pupil- diameter derivative (mm/s) 3 |
E | 0.000 ± 0.000 | 6.993 ± 0.114 | −0.041 ± 0.152 | 0.015 ± 0.026 |
| N-E | 0.000 ± 0.000 | −0.011 ± 0.010 | −0.002 ± 0.032 | −0.001 ± 0.006 | |
| Baselined SDNN (ms) 3 |
E | 0.000 ± 0.000 | 4.363 ± 22.123 | −4.257 ± 13.977 | 5.780 ± 18.861 |
| N-E | 0.000 ± 0.000 | 30.434 ± 61.439 | −13.292 ± 33.977 | −2.375 ± 58.385 | |
| Baselined RMSSD (ms) 3 |
E | 0.000 ± 0.000 | 18.934 ± 30.241 | 9.051 ± 18.609 | 16.374 ± 27.140 |
| N-E | 0.000 ± 0.000 | −34.743 ± 86.464 | −8.940 ± 47.154 | 1.340 ± 75.709 | |
| Baselined PNN50 (%) |
E | 0.000 ± 0.000 | 0.382 ± 0.454 | 0.623 ± 0.686 | 0.401 ± 0.449 |
| N-E | 0.000 ± 0.000 | −0.044 ± 0.501 | 0.173 ± 0.787 | −0.108 ± 0.510 | |
| LF (ms2/Hz) 3 |
E | 1.196 ± 2.825 | 14.776 ± 22.135 | 12.411 ± 26.253 | 0.909 ± 1.432 |
| N-E | 8.577 ± 28.084 | 0.797 ± 1.150 | 4.760 ± 13.400 | 1070.000 ± 34,400.000 | |
| HF (ms2/Hz) 3 |
E | 0.021 ± 0.049 | 0.176 ± 0.274 | 0.147 ± 0.300 | 0.008 ± 0.012 |
| N-E | 0.104 ± 0.344 | 0.011 ± 0.021 | 0.012 ± 0.024 | 1770.000 ± 5860.000 | |
| LFnu (%) |
E | 0.425 ± 0.364 | 99.505 ± 0.554 | 98.923 ± 0.606 | 99.263 ± 0.568 |
| N-E | 0.382 ± 0.506 | 82.252 ± 37.974 | 90.390 ± 29.900 | 81.900 ± 35.703 | |
| HFnu (%) |
E | 0.005 ± 0.008 | 0.495 ± 0.554 | 1.077 ± 0.606 | 0.737 ± 0.568 |
| N-E | 0.003 ± 0.007 | 0.562 ± 0.675 | 0.539 ± 0.857 | 2.345 ± 4.320 | |
| LF/HF ratio (Unitless) |
E | 425.491 ± 283.706 | 616.648 ± 541.243 | 179.885 ± 215.633 | 281.295 ± 258.100 |
| N-E | 566.180 ± 177.973 | 408.872 ± 363.832 | 527.458 ± 423.384 | 400.036 ± 729.143 |
1 Column Expertise Group is presented with E for experts and N-E for non-experts. 2 Rest: baseline stage; housing assembly: low-complexity stage; gear assembly: medium-complexity stage; rotor and cover assembly: high-complexity stage.3 Units: “mm” is an abbreviation for millimetres; “mm/s” stands for millimetres per second; “ms” stands for milliseconds, “ms2/Hz” stands for milliseconds squared per hertz.