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Table 1 Model validation metrics (average error and cross-correlation values) across display configurations and perturbations

From: A mathematical model for incorporating biofeedback into human postural control

 

Average error (Sway)

 

AP

ML

 

180°

225°

225°

90°

Tactors off

0.16°

0.19°

0.09°

0.19°

1×2

0.85°

0.27°

0.11°

-

3×4

0.33°

0.36°

0.10°

0.18°

3×8

-

0.21°

0.14°

-

3×16

-

0.30°

0.12°

-

 

Cross-correlation value (Sway)

 

AP

ML

 

180°

225°

225°

90°

Tactors off

0.998

0.99

0.97

0.95

1×2

0.94

0.97

0.98

-

3×4

0.98

0.95

0.98

0.96

3×8

-

0.98

0.95

-

3×16

-

0.97

0.93

-

 

Average error (COP)

 

AP

ML

 

180°

225°

225°

90°

Tactors off

0.47 cm

0.21 cm

0.33 cm

0.46 cm

1×2

0.49 cm

0.26 cm

0.51 cm

-

3×4

0.46 cm

0.23 cm

0.51 cm

0.42 cm

3×8

-

0.34 cm

0.49 cm

-

3×16

-

0.27 cm

0.42 cm

-

 

Cross-correlation value (COP)

 

AP

ML

 

180°

225°

225°

90°

Tactors off

0.98

0.99

0.98

0.98

1×2

0.97

0.98

0.93

-

3×4

0.96

0.99

0.93

0.98

3×8

-

0.97

0.92

-

3×16

-

0.98

0.95

-

  1. Results for all display configurations, with the exception of the 1×2 case, were obtained by fitting the model to the corresponding experimental data. The model for the 1×2 display configuration was fit to the experimental data from the 3×4 case. All parameters obtained for the tactors-off condition were held fixed in the tactors-on configurations.