Table 2 Wilcoxon test results and effect sizes (SMD with 95% CI) for pre- vs. post-neurofeedback movement metrics. FS: Foot Stomping, HPS: Hand Pronation Supination, SMD: Standardized Mean Difference, \(W\): test statistic; *\(p < 0.05\), **\(p < 0.01\).
FS Metric (N=10) | W | p | SMD [95% CI] | HPS Metric (N=10) | W | p | SMD [95% CI] |
|---|---|---|---|---|---|---|---|
General Metrics | |||||||
Acceleration magnitude | 7.0 | 0.037* | 0.57 [–0.15, 1.28] | Angular velocity magnitude | 26 | 0.092 | 0.20 [–0.51, 0.92] |
Speed | |||||||
Steps per second | 3.0 | 0.010** | 0.94 [0.22, 1.65] | Turns per second | 14.0 | 0.193 | 0.46 [–0.25, 1.18] |
Mean peak velocity | 0.0 | 0.002** | 0.85 [0.13, 1.56] | Mean peak angular velocity | 17.0 | 0.322 | 0.41 [–0.30, 1.13] |
Amplitude | |||||||
Mean step amplitude | 17.0 | 0.570 | −0.02 [–0.74, 0.70] | Mean turn amplitude | 24.0 | 0.770 | −0.08 [–0.80, 0.63] |
Total distance | 27 | 1.000 | 0.02 [–0.70, 0.74] | Cumulative angular displacement | 14 | 0.193 | 0.45 [–0.27, 1.16] |
Hesitations | |||||||
Spectral arc length | 12.0 | 0.131 | 0.41 [–0.30, 1.13] | Spectral arc length | 23.0 | 0.695 | 0.08 [–0.64, 0.79] |
Log-jerk velocity | 9.0 | 0.064 | 0.62 [–0.10, 1.33] | Log-jerk velocity | 17.0 | 0.322 | −0.38 [–1.10, 0.34] |
Halts | |||||||
Number of halts | 0.0 | 0.059 | 0.71 [–0.01, 1.42] | Number of halts | 2.5 | 0.625 | −0.32 [–1.03, 0.40] |
Step intervals | 5.0 | 0.020* | −0.64 [–1.35, 0.08] | Turn intervals | 12.0 | 0.131 | −0.58 [–1.29, 0.14] |
Decrementing Amplitude | |||||||
Amplitude change | 17.0 | 0.322 | 0.04 [–0.68, 0.75] | Turn amplitude change | 25.0 | 0.846 | 0.10 [–0.62, 0.81] |
Slope of step height | 20.0 | 0.492 | −0.10 [–0.82, 0.61] | Slope of turn angle | 24.0 | 0.770 | −0.16 [–0.88, 0.55] |