|
Angle measurement precision evaluated by different indicators based on absolute (mean and standard deviation – SD), root mean square (RMS) and maximum (max.) errors. |
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| Theoretical |
|||||||||
| Angle Tested |
80.00 |
60.00 |
40.00 |
20.00 |
0.00 |
-20.00 |
-40.00 |
-60.00 |
-80.00 |
|
|
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| Empirical Angles |
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| Mean* (N) |
80.47 |
59.48 |
40.14 |
20.13 |
-0.25 |
-20.237 |
-40.05 |
-60.00 |
-79.66 |
| Mean SD (N) |
0.91 |
1.55 |
1.54 |
1.04 |
1.15 |
1.255 |
0.95 |
0.84 |
0.96 |
| Mean Error** (N) |
0.49 |
0.64 |
0.56 |
0.32 |
0.54 |
0.654 |
0.42 |
0.31 |
0.38 |
| SD Error (N) |
0.38 |
0.43 |
0.48 |
0.41 |
0.54 |
0.699 |
0.31 |
0.20 |
0.16 |
| RMS Error (N) |
0.61 |
0.75 |
0.72 |
0.50 |
0.74 |
0.928 |
0.51 |
0.37 |
0.41 |
| Max Error (N) |
1.25 |
1.21 |
1.52 |
1.30 |
1.87 |
2.130 |
1.02 |
0.72 |
0.66 |
|
* Corrected for systematic offset of -1.51°. ** Relative to the corrected empirical mean | |||||||||
Bourbonnais et al. Journal of NeuroEngineering and Rehabilitation 2008 5:2 doi:10.1186/1743-0003-5-2 |
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